{"id":524335,"date":"2025-06-12T14:53:52","date_gmt":"2025-06-12T09:23:52","guid":{"rendered":"https:\/\/www.spinny.com\/blog\/?p=524335"},"modified":"2026-10-28T17:37:14","modified_gmt":"2026-10-28T12:07:14","slug":"what-is-dpf-in-diesel-cars","status":"publish","type":"post","link":"https:\/\/www.spinny.com\/blog\/what-is-dpf-in-diesel-cars\/","title":{"rendered":"What is DPF in Cars?"},"content":{"rendered":"\n<p>A diesel particulate filter (DPF) is a part of a diesel car\u2019s exhaust system that traps soot before it leaves the tailpipe. India moved from BS4 to BS6 emission norms in April 2020, and to meet BS6 limits almost every diesel car now needs a DPF. Since 1 April 2023, BS6 Phase 2 has added Real Driving Emissions (RDE) checks, which means cars are tested on actual roads, not just in a lab [verify on morth.gov.in]. Current diesels have to keep soot and NOx low in everyday traffic too, which makes the DPF and its regeneration more important than ever.<\/p>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li><a href=\"#why-are-dp-fs-essential-in-modern-diesel-cars\">Why are DPFs Essential in Modern Diesel Cars?<\/a><\/li><li><a href=\"#how-does-a-dpf-work\">How does a DPF Work?<\/a><\/li><li><a href=\"#which-diesel-cars-have-a-dpf\">Which diesel cars have a DPF?<\/a><\/li><li><a href=\"#dpf-regeneration-explained\">DPF Regeneration Explained<\/a><\/li><li><a href=\"#dpf-maintenance-and-best-practices\">DPF Maintenance and Best Practices<\/a><\/li><li><a href=\"#dpf-cleaning-vs-replacement-cost\">DPF cleaning vs replacement cost<\/a><\/li><li><a href=\"#dpf-delete-is-illegal\">DPF delete is illegal<\/a><\/li><li><a href=\"#used-diesel-with-a-dpf-what-to-check\">Used diesel with a DPF: what to check<\/a><\/li><li><a href=\"#common-dpf-problems-and-their-solutions\">Common DPF Problems and Their Solutions<\/a><\/li><li><a href=\"#conclusion\">Summary<\/a><\/li><li><a href=\"#fa-qs-about-dpf\">FAQs about DPF in Diesel Cars<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"why-are-dp-fs-essential-in-modern-diesel-cars\">Why are DPFs Essential in Modern Diesel Cars?<\/h2>\n\n\n\n<p>Year after year, diesel engines have plundered plaudits for their high fuel efficiency and torque output which is significantly more than that of petrol engines. These advantages had made diesel engines the popular choice of engine not just for commercial vehicles, but in SUVs and smaller passenger vehicles such as sedans and hatchbacks as well. However, diesel engines have always had an inherent drawback. They are known for emitting particulate matter (PM), more commonly known as soot.<\/p>\n\n\n\n<p>There are microscopic particles that are made up mostly of carbon atoms that are a major air pollutant. PM or Particulate Matter is of different sizes. For example, PM 10 refers to particles that are smaller than 10 microns in size. These particles can enter the lungs when we breathe in air, and accumulate over time, creating health hazards. Furthermore, PM 2.5 particles are less than 2.5 microns in size, and not only can we breathe them in, but such small particles can enter the bloodstream as well, reaching different parts of our body. Particulate Matter can also contribute to smoggy conditions or reduced visibility.<\/p>\n\n\n\n<p>Over the years, the growing environmental awareness has brought new laws into place, curbing exhaust gas emissions. The Indian government made serious inroads to curb vehicular emissions when it transitioned from BS4 to BS6 emission norms in 2020, which saw a strict clamp down on the amount of permissible NOx and PM emissions for diesel vehicles, bringing them in line with global standards. To meet these stringent emission norms, the use of a Diesel Particulate Filter or DPF became absolutely mandatory for modern diesel vehicles.<\/p>\n\n\n\n<p>Diesel engines produce more soot than petrol engines, which is why a petrol car doesn\u2019t need a DPF. If you\u2019re weighing the two fuels and EV vs petrol vs diesel cost of ownership. For how diesel, petrol and hybrid engines differ.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-does-a-dpf-work\">How does a DPF Work?<\/h2>\n\n\n\n<p>On a very basic level, a DPF is a ceramic filter designed to trap the particulate matter in the exhaust gases. Engineers usually place it in a stainless steel container, and it is usually placed close to the engine to maintain high operating temperatures. We shall learn more about why this is necessary further in the article.<\/p>\n\n\n\n<p>At its core, a DPF is a ceramic filter designed to trap particulate matter from the exhaust stream. It is typically housed within a stainless steel casing and integrated into the exhaust system, often located close to the engine to maintain optimal operating temperatures.<\/p>\n\n\n\n<p>Most commonly, Diesel Particulate Filters are made out of cordierite or silicon carbide. These elements are moulded into a honeycomb structure through which the exhaust gases are pushed. The honeycomb structure consists of alternating channels, some of which are plugged are open at the front and plugged at the back, whereas others are open at the back and plugged at the front. This forces the exhaust gases to flow through the walls of the filter, which are porous in nature, rather than simply passing straight through the filter.<\/p>\n\n\n\n<p>Here\u2019s a detailed breakdown of the working of a DPF:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Soot Trapping:<\/strong> The hot exhaust gases are pumped out from the engine and into the DPF. As they enter the ceramic filter, they are forced to flow through the walls of the DPF. The soot particles, which are larger than the pores of the filter, get stuck in its internal structure whereas the cleaner exhaust gases, largely free of particulate matter, exit from the DPF.<\/li>\n\n\n\n<li><strong>Accumulation:<\/strong> Over hundreds and thousands of kilometres, the soot is continuously deposited into the DPF. As this build up of soot increases, it starts to create a back pressure on the engine. This pressure is monitored by the ECU typically using pressure sensors which are positioned before and after the Diesel Particulate Filter.<\/li>\n\n\n\n<li><strong>Regeneration:<\/strong> Once the soot has accumulated beyond a point, it can start to choke the DPF. This is referred to as the DPF being \u2018loaded\u2019 or \u2018clogged\u2019 and is a natural part of the entire DPF cycle. However, allowing the soot to build beyond this point can cause excess back pressure on the engine, reducing its power output, increasing fuel consumption and even damaging the engine. To avoid this, the DPF is cleaned periodically through a process called \u2018Regeneration\u2019.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"which-diesel-cars-have-a-dpf\">Which diesel cars have a DPF?<\/h2>\n\n\n\n<p>Under BS6, practically every diesel passenger car sold in India since April 2020 has a DPF. Here are some popular examples:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Car<\/strong><\/td><td><strong>Status<\/strong><\/td><\/tr><tr><td><a href=\"https:\/\/www.spinny.com\/cars\/kia\/sonet\/?utm_source=DPFinCars&amp;utm_medium=BlogLink\">Kia Sonet diesel<\/a><\/td><td>Officially confirmed (DPF regeneration procedure in owner\u2019s manual)<\/td><\/tr><tr><td><a href=\"https:\/\/www.spinny.com\/cars\/toyota\/innova-crysta\/?utm_source=DPFinCars&amp;utm_medium=BlogLink\">Toyota Innova Crysta<\/a> \/ <a href=\"https:\/\/www.spinny.com\/cars\/toyota\/fortuner\/?utm_source=DPFinCars&amp;utm_medium=BlogLink\">Fortuner<\/a> diesel<\/td><td>Toyota confirms a DPF system with manual regeneration switch; models not named on the page<\/td><\/tr><tr><td><a href=\"https:\/\/www.spinny.com\/cars\/kia\/seltos\/?utm_source=DPFinCars&amp;utm_medium=BlogLink\">Kia Seltos diesel<\/a><\/td><td>Reported<\/td><\/tr><tr><td><a href=\"https:\/\/www.spinny.com\/cars\/tata\/sierra\/?utm_source=DPFinCars&amp;utm_medium=BlogLink\">Tata Sierra diesel<\/a><\/td><td>Reported<\/td><\/tr><tr><td><a href=\"https:\/\/www.spinny.com\/cars\/mahindra\/thar\/?utm_source=DPFinCars&amp;utm_medium=BlogLink\">Mahindra Thar diesel<\/a><\/td><td>Reported<\/td><\/tr><tr><td><a href=\"https:\/\/www.spinny.com\/cars\/mahindra\/xuv-3xo\/?utm_source=DPFinCars&amp;utm_medium=BlogLink\">Mahindra XUV 3XO diesel<\/a><\/td><td>Reported (park regeneration feature on predecessor XUV300)<\/td><\/tr><tr><td><a href=\"https:\/\/www.spinny.com\/cars\/hyundai\/tucson\/?utm_source=DPFinCars&amp;utm_medium=BlogLink\">Hyundai Tucson diesel<\/a><\/td><td>Reported<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"dpf-regeneration-explained\">DPF Regeneration Explained<\/h2>\n\n\n\n<p>Regeneration is the process of burning the soot accumulated inside the DPF filter. The soot is oxidized and converted into less harmful substances such as ash and carbon dioxide. Regeneration of a DPF is important for its proper functioning and maintaining the overall health of the engine. Here\u2019s a look at the different types of Regeneration:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-passive-regeneration\">1. Passive Regeneration<\/h3>\n\n\n\n<p>This happens on its own during steady, faster driving, typically around 60\u201380 km\/h, when exhaust temperatures reach roughly 250\u2013450\u00b0C. These are typical industry figures, not taken from an Indian owner\u2019s manual.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mechanism:<\/strong> When a vehicle is driven at higher speeds, typically between 60 and 80 km\/h, for an extended period of time, the temperature of the exhaust gases can rise to anywhere between 250 degree to 450 degree celsius. Such conditions are often met when cruising on the highway or driving on wide open city roads. At such temperatures, the soot in the DPF slowly burns away and is converted into ash and CO2.<\/li>\n\n\n\n<li><strong>Benefits: <\/strong>Passive Regeneration is the most efficient type of DPF cleaning as it requires no intervention from the driver or the onboard computers of the vehicle. Instead, it simply relies on consistent driving conditions.<\/li>\n\n\n\n<li><strong>Challenges:<\/strong> In urban environments, where the commutes are short, stop and go traffic is frequent and the speeds aren\u2019t all that high, the temperature of the exhaust gases doesn\u2019t climb as high as required for Passive Regeneration. This is when Active Regeneration becomes necessary.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-active-regeneration\">2. Active Regeneration<\/h3>\n\n\n\n<p>The engine\u2019s computer (ECU) raises exhaust temperature to typically around 550\u2013600\u00b0C (also a typical figure) by injecting extra fuel. You may notice higher idle revs, a cooling fan running after switch-off, or slightly higher fuel use. Don\u2019t switch off mid-cycle if you can avoid it.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mechanism:<\/strong> During Active Regeneration, the temperature of the exhaust gases needs to be raised to 550 to 600 degree celsius to burn away the collected soot. The ECU uses different strategies to achieve the desired result.\n<ul class=\"wp-block-list\">\n<li>Most commonly, fuel is injected into the exhaust system which then ignites near the DPF and raises the overall temperature of the system to burn off the soot.<\/li>\n\n\n\n<li>The ECU can also adjust different engine parameters such as injection timing, EGR (Exhaust Gas Recirculation) valve operation, and the air intake to create hotter exhaust gases.<\/li>\n\n\n\n<li>Although not as common, car makers can also use heaters in the exhaust system to raise the temperature of the DPF.&nbsp;<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Driver Awareness:<\/strong> During the process of Active Regeneration, the driver could notice some subtle differences such as slightly increased RPMs, change in engine noise, brief burning smell, increase in fuel consumption and the engine start-stop system is disabled. It is important to know this as driver\u2019s can sometimes mistake this for a fault with the car.&nbsp;<\/li>\n\n\n\n<li><strong>Importance of Completion:<\/strong> Once started, it is crucial that an Active Regeneration Cycle is completed fully. If the cycle is interrupted by switching off the engine, it can lead to further clogging of the DPF and will eventually lead to the DPF light coming on in the instrument cluster.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-forced-regeneration\">3. Forced Regeneration<\/h3>\n\n\n\n<p>At times, repeated attempts at Active Regeneration can fail or the DPF can become severely clogged. In such instances, a Forced Regeneration is required. This is also sometimes referred to as Service Regeneration.<\/p>\n\n\n\n<p>Some cars let you start a parked regeneration yourself. In Kia\u2019s case, the engine holds about 2,000 rpm for 30\u201360 minutes while the car is parked. Toyota uses a DPF switch that works only when the display asks for it. Toyota also notes that regeneration doesn\u2019t work above 4,000 m, which matters on Ladakh and Spiti trips.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mechanism:<\/strong> A Forced Regeneration is typically conducted by a service technician at the service centre, however, certain cars such as the Toyota Innova Crysta also have a switch for Forced Regeneration. For this procedure, the car needs to be stationary and the engine is held at a specific RPM to generate hot exhaust gases. Most cars require a diagnostic tool to conduct Forced Regeneration.<\/li>\n\n\n\n<li><strong>When it\u2019s Needed:<\/strong> It&#8217;s a sort of last resort before your mechanic suggests manually opening and cleaning the DPF or replacing it entirely. Forced Regeneration is also used when driving the vehicle for extended periods still doesn\u2019t resolve a DPF issue and switches off the DPF light in the instrument cluster.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"dpf-maintenance-and-best-practices\">DPF Maintenance and Best Practices<\/h2>\n\n\n\n<p>While all components of an exhaust system, including the DPF, are highly robust due to the extreme heat stress they go through, their effective operation and life span can depend on proper maintenance and driving habits. Furthermore, ignoring DPF related problems can cause other components of the engine to fail as well.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Understand Your Driving Style:<\/strong> If you drive mostly in urban environments over short distances and at low speeds, then, your diesel vehicle will mostly rely on Active Regeneration to clean the DPF. You should watch out for signs of Active Regeneration which are listed above, and try to not interrupt the cycle. Alternatively, you should also take your car out on the highway once a month for an hour-long drive at around 80 km\/h to clean the DPF through Passive Regeneration.<\/li>\n\n\n\n<li><strong>DPF Light:<\/strong> Modern diesel cars have a dedicated light for DPF and it is positioned in the instrument cluster of the vehicle. If the light comes on and continuously stays on, it is an indicator that the vehicle DPF is clogged and a regeneration cycle is required. In such a situation, you need to drive the vehicle continuously at highway speeds to clean the DPF. However, if the light is blinking, it can signal the requirement of a Forced Regeneration or an otherwise fault in the DPF system. It\u2019s an indicator to immediately visit the service centre.<\/li>\n\n\n\n<li><strong>Use Correct Engine Oil:<\/strong> DPF equipped vehicles need low-ash or low SAPS (Sulphated Ash, Phosphorous, Sulphur) engine oils to function properly. Conventional engine oils have the above mentioned metals that can permanently clog the DPF.<\/li>\n\n\n\n<li><strong>Use Quality Diesel:<\/strong> DPF equipped vehicles are supposed to run on ultra-low sulphur diesel. Poor quality diesel can also lead to increased soot production and will quickly clog up the DPF.<\/li>\n\n\n\n<li><strong>Address Engine Issues Promptly:<\/strong> Underlying engine issues such as faulty injectors, turbocharger problems, or simply a malfunctioning sensor can lead to excessive soot production in diesel cars, leading to a clogged up DPF. Such issues should be checked and addressed promptly.<\/li>\n\n\n\n<li><strong>Avoid Excessive Idling:<\/strong> Idling for longer durations can lead to DPF issues. In such a case, the exhaust gases don\u2019t reach the required temperature for DPF cleaning which can lead to the soot build up.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"dpf-cleaning-vs-replacement-cost\">DPF cleaning vs replacement cost<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Forced regeneration at a service centre:<\/strong> Usually the first fix for a clogged DPF.<\/li>\n\n\n\n<li><strong>Off-car DPF cleaning:<\/strong> Not every OEM approves off-car cleaning, so ask first.<\/li>\n\n\n\n<li><strong>DPF replacement:<\/strong> Expensive. One Kia Seltos owner was reportedly quoted \u20b91.57 lakh, including labour, for the DPF and catalytic converter unit.<\/li>\n\n\n\n<li><strong>Warranty:<\/strong> The DPF is usually covered against manufacturing defects during the standard warranty. Clogging caused by short trips or ignored warnings may be treated as a usage issue. Check whether your extended warranty covers emission parts.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"dpf-delete-is-illegal\">DPF delete is illegal<\/h2>\n\n\n\n<p>Some workshops offer a \u201cDPF delete\u201d (cutting out the filter and remapping the ECU). Don\u2019t do it. It breaks the BS6 emission compliance your car was certified with. Altering a vehicle so it no longer matches its manufacturer specification is not allowed under Section 52 of the Motor Vehicles Act, and driving a car that breaks emission standards can be penalised under Section 190(2). A deleted car will likely fail its PUC smoke test, can cause insurance claim disputes and voids the warranty.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"used-diesel-with-a-dpf-what-to-check\">Used diesel with a DPF: what to check<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Warning light:<\/strong> Start the car and make sure the DPF light and check-engine light go out after the bulb check.<\/li>\n\n\n\n<li><strong>Regeneration history:<\/strong> Ask the seller or a service centre for an OBD scan of soot load and regeneration count. Frequent failed regenerations are a red flag.<\/li>\n\n\n\n<li><strong>Past use:<\/strong> A diesel that only did short city trips is more likely to have DPF trouble than one used on highways. Check the service history for repeated \u201cforced regeneration\u201d entries.<\/li>\n\n\n\n<li><strong>Oil level:<\/strong> If the oil level is above the max mark, frequent regenerations may have diluted the oil with diesel.<\/li>\n\n\n\n<li><strong>Exhaust:<\/strong> Look for signs of tampering, such as cut or welded pipes or a missing DPF sensor connection.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"common-dpf-problems-and-their-solutions\">Common DPF Problems and Their Solutions<\/h2>\n\n\n\n<p>Despite being highly robust in their construction, DPFs are susceptible to certain issues. The table below lists the common causes, symptoms and solutions for such problems.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Problem<\/strong><\/td><td><strong>Cause<\/strong><\/td><td><strong>Symptom<\/strong><\/td><td><strong>Solution<\/strong><\/td><\/tr><tr><td><strong>Soot Clogging<\/strong><\/td><td>1. Frequent short journeys<br>2. Low speed driving<br>3. Interrupted Regeneration cycles<br>4. Excessive idling<br>5. Engine problems creating high soot<\/td><td>1. DPF warning light<br>2. Reduced engine power<br>3. Increased fuel consumption<br>4. Harsh engine noise<\/td><td>1. Attempt Passive or Active Regeneration. Follow the owners manual for precise steps<br>2. Have a technician conduct a Forced Regeneration<br>3. Professional DPF cleaning<\/td><\/tr><tr><td><strong>Ash Accumulation<\/strong><\/td><td>1. Ash naturally collect over several years<br>2. Use of incorrect engine oil<\/td><td>1. DPF warning light<br>2. Reduced engine power<br>3. Increased fuel consumption<br>4. Harsh engine noise<\/td><td>1. Professional DPF cleaning<br>2. DPF replacement<\/td><\/tr><tr><td><strong>Melted\/Damaged DPF Core<\/strong><\/td><td>1. Extremely high temperatures during regeneration due to malfunctioning engine<br>2. Physical impact<\/td><td>1. Severe exhaust restriction<br>2. Loud exhaust noise<br>3. Engine overheating<br>4. Immediate DPF warning light<\/td><td>1. DPF replacement<\/td><\/tr><tr><td><strong>Sensor Malfunction<\/strong><\/td><td>1. DPF system relies on multiple sensors and their failure can hinder the ECUs ability to regenerate<\/td><td>1. DPF warning light<br>2. Engine warning light<br>3. Incorrect regeneration cycles4. Performance issues<\/td><td>1. Diagnostic tool to scan for faulty sensor and replace it<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"conclusion\">Summary<\/h2>\n\n\n\n<p>The enforcement of BS6 emission norms greatly elevated the role of DPFs for treating exhaust gases in diesel engines. The initial years saw many DPF issues crop up due to drivers being unaware of the new technology, however, such issues have steadily declined over time. The future of diesel passenger cars is also up for debate in India with government policies favouring greener alternatives.<\/p>\n\n\n\n<p>However, as far as DPF is concerned, it is the cornerstone for emission control among diesel vehicles, not just in India, but globally as well. As long as diesel cars continue to be sold in India, DPF systems will continue to be a part of them. As far as their maintenance is concerned, correct driving habits and following the best practices related to DPF can ensure that the system functions flawlessly.<\/p>\n\n\n\n<p><strong>Related Blogs:<\/strong><br><a href=\"https:\/\/www.spinny.com\/blog\/bs6-norms-complete-details-of-bharat-stage-6-emission-standard\/\">BS6 Norms: Complete Details Of Bharat Stage 6 Emission Standard<\/a><br><a href=\"https:\/\/www.spinny.com\/blog\/rde-norms-explained\/\">Real Driving Emission (RDE) Norms: All You Need To Know<\/a><br><a href=\"https:\/\/www.spinny.com\/blog\/petrol-vs-diesel-performance-compared\/\">Petrol vs Diesel: Performance Compared<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"fa-qs-about-dpf\">FAQs about DPF in Diesel Cars<\/h2>\n\n\n<div class=\"saswp-faq-block-section\"><ol style=\"list-style-type:none\"><li style=\"list-style-type: none\"><h3 class=\"\">Q. What is DPF and why is it in my car?<\/h3><p class=\"saswp-faq-answer-text\">DPF stands for Diesel Particulate Filter and is an emission control device that helps in significantly reducing the soot or Particulate Matter (PM) emission in the exhaust gases of a diesel engine. A DPF is present in your car, primarily to ensure that it can adhere to the BS6 emission standards for diesel engines.<\/p><li style=\"list-style-type: none\"><h3 class=\"\">Q. How does a DPF work?<\/h3><p class=\"saswp-faq-answer-text\">A DPF or Diesel Particulate Filter is made of a ceramic material, mostly cordierite or silicon carbide. This material is made into a honeycomb structure and its walls are porous. Some of the channels in the structure are blocked at the front end whereas some channels are blocked at the rear end. This forces the exhaust gases to pass through the walls of the DPF. The soot particles in the exhaust are captured by the walls and the cleaner exhaust gases are allowed to pass on.<\/p><li style=\"list-style-type: none\"><h3 class=\"\">Q. What is DPF Regeneration?<\/h3><p class=\"saswp-faq-answer-text\">A DPF filter can get clogged with soot over time, so much so that it starts to create a back pressure. This soot needs to be cleared away and this is done via the process of Regeneration. It simply involves raising the temperature of the DPF via different methods to burn away the trapped soot. This soot turns into ash or carbon dioxide. There are different types of DPF regeneration such as Passive, Active and Forced.<\/p><li style=\"list-style-type: none\"><h3 class=\"\">Q. What is the difference between Passive and Active DPF Regeneration?<\/h3><p class=\"saswp-faq-answer-text\">Passive Regeneration occurs naturally without any involvement from the driver or the engine. Continuously driving at highway speeds can heat up the exhaust system enough that it slowly clears away soot particles. In Active Regeneration, the ECU commonly dumps extra fuel into the exhaust system to raise the temperature of the DPF to burn away the excess soot. The ECU can use different techniques to raise the exhaust temperature during Active Regeneration.<\/p><li style=\"list-style-type: none\"><h3 class=\"\">Q. Can I remove or delete the DPF?<\/h3><p class=\"saswp-faq-answer-text\">No. It\u2019s illegal because the car no longer meets the BS6 emission standards it was certified for, it will likely fail a PUC test, and it voids your warranty.<\/p><li style=\"list-style-type: none\"><h3 class=\"\">Q. How much does DPF cleaning or replacement cost in India?<\/h3><p class=\"saswp-faq-answer-text\">Replacement can run above \u20b91.5 lakh; one Kia Seltos owner was reportedly quoted \u20b91.57 lakh. Check your warranty before paying.<\/p><li style=\"list-style-type: none\"><h3 class=\"\">Q. Which diesel cars have a DPF?<\/h3><p class=\"saswp-faq-answer-text\">Almost every BS6 diesel sold since April 2020, including the Kia Sonet and Seltos, Toyota Innova Crysta and Fortuner, Mahindra Thar, Tata Sierra and Hyundai Tucson diesels. Maruti no longer sells diesel cars.<\/p><li style=\"list-style-type: none\"><h3 class=\"\">Q. Is a used diesel with a DPF a good buy?<\/h3><p class=\"saswp-faq-answer-text\">Yes, if it was used mostly on highways and has a clean regeneration history. Avoid one that did only short city runs, shows DPF warnings or has had its DPF removed.<\/p><\/ul><\/div>","protected":false},"excerpt":{"rendered":"<p>Learn what a Diesel Particulate Filter (DPF) does in BS6 diesel cars, how it traps soot, the types of regeneration cycles, common issues and key maintenance tips.<\/p>\n","protected":false},"author":38,"featured_media":5696,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"cos_headline_score":0,"cos_seo_score":0,"cos_headline_text":"Auto Draft","cos_headline_has_been_analyzed":false,"cos_last_analyzed_headline":[],"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"_ayudawp_aiss_exclude":false,"_ayudawp_aiss_summary":"","_ayudawp_aiss_summary_provider":"","_ayudawp_aiss_summary_hash":"","footnotes":""},"categories":[5076],"tags":[3078,7385],"class_list":["post-524335","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-z","tag-diesel-car","tag-diesel-particulate-filter"],"acf":[],"jetpack_featured_media_url":"https:\/\/spn-sta.spinny.com\/blog\/20220228131522\/DPF-cutout.jpg","_links":{"self":[{"href":"https:\/\/www.spinny.com\/blog\/wp-json\/wp\/v2\/posts\/524335","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.spinny.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.spinny.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.spinny.com\/blog\/wp-json\/wp\/v2\/users\/38"}],"replies":[{"embeddable":true,"href":"https:\/\/www.spinny.com\/blog\/wp-json\/wp\/v2\/comments?post=524335"}],"version-history":[{"count":4,"href":"https:\/\/www.spinny.com\/blog\/wp-json\/wp\/v2\/posts\/524335\/revisions"}],"predecessor-version":[{"id":545974,"href":"https:\/\/www.spinny.com\/blog\/wp-json\/wp\/v2\/posts\/524335\/revisions\/545974"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.spinny.com\/blog\/wp-json\/wp\/v2\/media\/5696"}],"wp:attachment":[{"href":"https:\/\/www.spinny.com\/blog\/wp-json\/wp\/v2\/media?parent=524335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.spinny.com\/blog\/wp-json\/wp\/v2\/categories?post=524335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.spinny.com\/blog\/wp-json\/wp\/v2\/tags?post=524335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}