Vw t5 1 p0401. 6 TDI Volkswagen Passat Mass Air Flow sensor - Removal - Clean - Test How To Test A Mass Air Flow Sensor (Andy’s Garage: Episode - 287) Hello - after advice on my 61 plate 180 Further to my previous post re PO403 fault code this has now been cleared (by VW dealer over a remote connection from Germany I’m told). Find out what you can do next to solve the problem you are Hi Leute, ich habe versucht im Forum was dazu zu finden leider ohne Erfolg. ️ Your Queries & Tags for Reference:- p0401 p0401 volkswagen p0401 Morning all, I am having problems with my EGR valve on my T5 2012 2. I need some help with an EGR fault that I am seeing, if I keep the car at ~1900 revs, the engine workshop light comes on and an OBD scan shows it to be the P0401 the 5 digit number to the left of the list is the number that shows up on vagcom at the start of the fault when you scan. Repair Information for P0401 Volkswagen code. Since it is a generic code, it has the same meaning for the Volkswagen Transporter as it would I was on a long road trip this weekend (Ottawa to Toronto and back) and just before getting to Toronto I got a CEL. Each time the fault TechShop's Eric Garbe discusses diagnostic trouble code P0401 EGR Insufficient Flow. com/ TechShop: https://www. When you rev it up it has and take your foot off the throttle it 2017 ex AA T6 150hp 6 speed manual Day 1 of our 3 week 1200 mile road trip with our newly converted van and the engine light came on. I keep getting a Emissions work shop light appear and after running a scan it is coming up with 16785 The engine was mapped by Revo (stage 1) 3 years ago Now I have P0401 Code, but this time P0403 EGR 'A' control circuit / open. 9K views 6 replies 5 participants last post by Kelster Nov 21, 2023 So it seems - inevitable P0401. Here's exactly what you need to do to fix it. I have checked all connections and they are fine. T: if you get the message telling VW TDI 2. The EGR system is responsible for recirculating a portion Learn how to diagnose and fix the P0401 VAG Fault Codes. I lurk and learn on this site. Had an engine light on today. Read the code as p0401 P0401 - Generic Type Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled Description Exhaust Gas Recirculation "A" Flow Insufficient The P0401 code for Volkswagen vehicles indicates that there is a problem with the Exhaust Gas Recirculation (EGR) system. Now, EML on all of time and DEM Join us in this empowering tutorial and gain the knowledge and confidence to tackle P0401 EGR system issues in your Volkswagen. The garage rang The meaning of fault code P0401 DTC P0401 is registered by the engine control unit (engine control module) when it determines that an insufficient amount of exhaust gas is being redirected through Make: Volkswagen Code: P0401 Definition: Exhaust Gas Recirculation Flow Insufficient Detected Description: EGR mode, closed loop Fuel quantity, >6 mg/stroke Fuel quantity, <22 mg/stroke Video to help diagnose fault code p0401 EGR insufficient flow fault code on a vw Passat TDI with a 1. I think I've diagnosed this correctly, but I'd love for confirmation. 0tdi 102ps Looking for advice/experience regarding a rough idling issue It started when driving the van cold in Novemeber, just running along at around 1500rpm when the engine spluttered It shows a "P0401 (001025) EGR Insufficient Flow -- Intermittent" code and a "P2002 (008194) Particulate Trap, Bank 1, Efficiency Below Threshold" code The car has had the VW TDI emissions How to fix a P0101 engine code: Mass or Volume Air Flow "A" Circuit Range/performance How to Test a MAF Sensor with a Scan Tool Video: https://www. As soon as its warmed up it sounds sweet . 0, the EGR is the one with the cooler attached. We have in a VW Transporter which is logging a P0401 EGR system insufficient flow code. Eventually managed Check engine light came on, VCDS diagnostics as follows. More specifically it is insufficient flow. Hope you can help with a problem that is vexing me. However we are now Diagnosing P0401 EGR insufficient flow on an ALH Volkswagen TDI, the code can be somewhat misleading. Well, we´ve got you covered. launchtechusa. The last flush was done in January 2020. P0401 Code: Exhaust Gas Recirculation (EGR) Flow Insufficient Detected is often caused by a faulty EGR valve, but a vacuum leak or bad sensor can Macp M EGR valve p0401 Ryanpratt79 21 Oct 2025 General VW T6 Chat Replies 2 Views 346 22 Oct 2025 Ryanpratt79 The P0401 trouble code technically means "Exhaust Gas Recirculation Flow Insufficient Detected". Turbine is like new, and Here are some of the most common causes of the P0401 code: Here are some steps to diagnose and fix the P0401 code Remove the EGR valve and check for Was bedeutet der Fehlercode P0401? Dieser OBD2-Code im VW, Audi, Mercedes, BMW bedeutet, dass das elektronische Steuergerät (ECM) festgestellt hat, dass der Strom an This was carried out on a 2006 VW Jetta (Golf Mk5 / V) 2. Avez-vous déjà vu apparaître le code d'erreur P0401 sur votre scanner OBD2 et vous êtes-vous demandé ce que cela signifie? Si oui, cet article est fait pour Hi everyone one got a management light on when checked I have these codes they did clear but come bk and say pending now would cleaning the Egr and cooler Hey guys I just bought an 03 Jetta TDI with 102K miles on her and the MIL is on. We fixed the issue - find out how! Mastering MAF Sensors: Decoding P0101 & P0102 Codes! 1. 9, to commute to work. many thanx. Find out what it means, how it’s diagnosed, and all possible fixes to solve it. Do you know how to fix a P0401 code on VW Jetta Tdi? this is one of the questions our readers ask a lot. Kann es sein, das der VW Händler wo du hin fährst noch nie einen T6 gesehen hat ?? Praktisch die gesamte Baureihe ist in Bezug auf die Wartungsintervalle eine Mogelpackung !! Struggling with the engine fault code P0401 in your vehicle? Are you wondering what it means and how you fix it? We’ve got you covered. What is this code for? Thanks Van spec: MY18 204tdi DSG, covered 43k. Well, visited a VW garage to be tested - the van had accumulated 30 events in ECU 's memory since July 2021 (since 20 months now). It deals with the signal coming from the EGR system. 2 Multivan 102PS. New EGR fitted. Valeo What is the code P0401 on a VW Golf? What does P0401 mean? This code indicates that not enough exhaust gas is passing through the EGR to effectively lower the combustion A customer brought his Volkswagen Transporter to Fitch Autos with an EGR System Issue. com/ more Proper intake airflow is essential for the longevity of the DPF. Wir haben die langfristige Lö OBDII Trouble code P0401 is an EGR code. P0405 is a generic OBDII trouble code. The vehicle has had a Hi First ever post. Der Fehlercode ist wie Votre véhicule remonte un code d’erreur P0401 ? Découvrez la gravité, les causes, les solutions et le coût de la réparation. My scangauge shows the code P0401. Learn what Exhaust Gas Recirculation Flow Insufficient Detected means, location and how to repair. I have an engine light on displaying code P0401 which is EGR insufficient airflow. The EGR system Facing a P0401 error on my 2009 VW Touran 1. 1 Fault Found: 001025 - EGR System P0401 - 001 - Insufficient Flow - Intermittent - MIL ON Freeze Frame: Fault Status: 10100001 Join us in this detailed tutorial as we unravel the mysteries behind the P0401 code, diagnose EGR-related problems, and guide you through the The P0401 code for Volkswagen vehicles indicates that there is a problem with the Exhaust Gas Recirculation (EGR) system. 0 TDi, but it will be a similar procedure on other 2. Dealer replaced DPF filter I have a stage 2 Malone tune. I posted P0302 because it said Cylinder 2 had a misfire. my van is finally Hi all. Several months ago had glow plug light come on and lost power. 1 At first no warning lights or EML comes on then goes awayor after restart disappears. Hi I have a 2010 T5. In this case the computer does not detect enough EGR flow. Basically, this code Hallo Bulli Freunde, seit letzter Woche ist die gelbe Motorleuchte aktiv. 0 TDi PD cars from mid-2000s to around 2010 including the Audi A3, TT, VW Golf, Jetta Learn what the P0401 diagnostic trouble code means and how to troubleshoot insufficient exhaust gas recirculation (EGR) flow. I'm looking for some help with power loss (underboost) on a T5. 3K subscribers Subscribe Hi all T5. Komischerweise Hi, I'm new on the forum and its my first big issue with my 2014 Transporter. Exhaust Gas I can't find a solution to this problem. These things work together to deliver the correct amount Understand P0401 - Exhaust Gas Recirculation Flow Insufficient Detected error, its impact on your vehicle, and steps for troubleshooting and repair. Hi folks, I've only had my T5 for a month and the EML has come on 3 times now. Bei meinem großen blinkt während der fahrt die Glühkerzenleuchte mit der Meldung "Motorstörung" auf. I live in Trenton Ontario Canada and I want to do most of the work on the car myself. So, I decided to play with my 2 codes, P0401 and P2002. EGR has been cleaned out recently, but when Learn how to diagnose and fix the P0401 VAG Fault Codes. P0101 code in the Volkswagen Transporter is crucial to maintaining your truck's performance and ensuring it runs efficiently. 9 BLS despite replacing the EGR, flow meter, differential pressure sensor, and servicing the DPF. Im Fehlerspeicher steht folgenden Fehler drin: 4807 - Abgasrückführsystem P0401 00 [039] - Durchsatz zu klein Du hast Probleme mit deinem AGR-Ventil?Du hast es satt, das AGR-Ventil ständig zu reinigen? Dann bist du bei uns genau richtig. Vor ca. Here are the most common causes: 1. In today’s video, Jak Either VW needs to simplify the exhaust/emissions system, or they need to set up a school in the US to train at least one tech per dealership on how P0401 is a very common OBDII trouble code that'll pop up in the Volkswagen Golf. The The OBDII fault code P0401 means that the engine computer has detected that the Exhaust Gas Recirculation (EGR) system flow is insufficient. 0 CJAA P0401 EGR System Common Failures Explained Auto Resource 56. T5 Jump to Latest 3. Blocked EGR Tube– The tube that carries the exhaust gases back to the motor Check engine light came on, VCDS diagnostics as follows. The small EGR Pipe on the rear of the engine can crack, causing exhaust fu VW TDI 2. First noticed FWIW, I got a cel a few weeks ago and P0401 popped up. This code indicates that there is a problem with your van's Mass Air Flow Issues within the EGR system can throw off the P0401 OBD-II trouble code. Re: T5. P0401 - EGR System insufficient flow -Tested vacuum to the N18 valve. The EGR Can anyone shed some light I have a 2018 vw transporter 20 lt tdi it has a rough idle when cold. youtube. 0l on 97k miles with a Pendle map. 1 Fault Found: 001025 - EGR System P0401 - 001 - Insufficient Flow - Intermittent - MIL ON Freeze Frame: Fault Status: 10100001 The P0401 is a diagnostic trouble code that stands for Exhaust Gas Recirculation (EGR) Flow Insufficient Detected. 2 Wochen ging die Motorkontrolleuchte an und nach der Fehlerdiagnose hieß es Fehlercode p0401 AGR Durchfluss zu gering. I do have to mention I was doing Information on diagnosing and repairing a DTC trouble code P0401 which is insufficient EGR (exhaust gas recirculation) flow. I took the EGR off and cleaned it up. Understand EGR flow issues, causes, symptoms, and effective repair solutions. 1 2010: Decoding ross-tech output - EGR system Once again, just for the record: It's been to the VW dealer and had a complete cooler unit replaced at a whopping cost of over £1k! For Der OBD Fehlercode P0401 | VW, Audi, BMW, Mazda, Skoda, Seat & Co. VCDS code was egr valve related Hello Guys, First post here. It has to do with the emissions system and stands for Exhaust Gas Recirculation (EGR)→ Insufficient Flow. 0 - 2014. I cleared it twice using vag com, tonight it came on for the 3rd time so I scanned for faults. Diagnosing what is causing the P0401 code in the Transporter is typically not very tricky. I have read quite a few threads on here about the problems with these a lot are After spending a small fortune (luckily a lot covered by the RAC warranty) fixing numerous issues with my T6 including replacing drive shafts, stub shafts, alternator, front main oil seal etc. I had been getting P0401 codes when I took my Jetta in for it's 40k mile service. " This means the EGR system is not providing the required amount of exhaust gas back to the intake, or it is doing so at an There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). If a vehicle is found to have a damaged DPF, it is advised to inspect the condition of the intake air filter and verify resting position of the warm New EGR valve and cooler from VW (Pieburg, which could be got from motor factors, but not a massive saving (plus no stock at the time). 9 pd engine fitted. Borrowed a code reader in the campsite and got EGR flow A customer brought his VW Transporter to Links Automotive with an EML and Performance issue. . Getting a bad reading from the MAF results in poor runni Hallo zusammen, besitze einen T5. The EGR system is responsible for recirculating a portion of the Hi, I wondered if anyone may be able to help. techshopmag. I work in a Rubber Drove the van into town earlier and on the way back the engine warning light came up on the dash in orange. 1 2. We fixed the problem - find out how! Hi Folks My name is Fred and I drive a 2003 Jetta tdi 1. 0 CJAA P0401 EGR System Common Failures Explained The DPF Pressure Sensor - How To Avoid Expensive Diesel Particulate Filter Fails Hi all looking for some help with the few fault codes that appeared on a friends van i scanned the codes and cleared them off and they seemed to stay clear and not reappear when i scanned it for the Well, visited a VW garage to be tested - the van had accumulated 30 events in ECU's memory since July 2021 (since 20 months now). ~22in/hg -Had someone operate the throttle while I observed the My Van went into the garage today for a service, cam belt and an EGR investigation after I kept getting the old P0401 “Insufficient flow” fault code. Took it to the dealer in Hudson Oaks, TX and they called the next day saying that the Hi All, I am having a bit of a problem with my Golf Mk5 1. Understand EGR flow issues, causes, symptoms, and After long time driving with fault code P0401. The P0401 code indicates "Exhaust Gas Recirculation Flow Insufficient Detected. Got the various pipe gaskets too. It did not really take long, except for dropping tools and bolts Die typischen Fehlercodes bei AGR-Ventil Problemen: P0400, P0400, P0401, P0401, P0402, P0403, P0404, P0544, P13F6, P1400, P1405, P145D, P1958, P200A Want to know the reasons your scanner shows the P0401 code? This guide has beneficial information about its causes, symptoms, diagnosis, and more. I have intermittent power issues, sometimes my car will accelerate like a bat out of hell, then other times I feel like it's at 3/4 boost, every now and then I will step on it and it . In this case a failed EGR valve. 9 TDI BKC 105bhp 2005 plate. During the warranty period the EGR has been flushed 7 times, approximately every 6k miles. Once home, I plugged the Carista in and got the following fault code: P0401 - Discover how to diagnose and fix the OBD P0401 fault code for exhaust gas recirculation flow issues on your vehicle in this in-depth guide. | Symptome, Ursachen, Reparaturen & Kosten Im folgenden Artikel Im Fehlerspeicher steht folgenden Fehler drin: 4807 - Abgasrückführsystem P0401 00 [039] - Durchsatz zu klein Umgebungsbedingungen: Fehlerstatus 00000001 Fehlerprio: 2 Fumes In The VW Transporter, its a tricky one to track down, but here's the answer. co Popular Volkswagen Transporter fault codes along with an explanation of their meanings. I'm totally new to vag com so no I have a 2011 Jetta TDI with 50k miles on it. 2012 VW T5. Launch Tech USA: https://www. Today, I took a black n18 valve (which the tab isn't white) out of a Beetle (tdi) to replace the one I have in my 2003 Jetta (tdi) with a code of P0401 because I I got P0401 not P0302 from the thread title Help with test and code p0401 as I couldn't see any reference to that in the pdf you posted. A quick update on what happened. Erased the code and it popped back up about 250 miles later.
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