2001年7月21日 · Check engine light came on, VCDS diagnostics as follows. 1 Fault Found: 001025 - EGR System P0401 - 001 - Insufficient Flow - Intermittent - MIL ON Freeze Frame: Fault Status: 10100001 Fault Priority: 2...

2011年1月9日 · I think all these threads on this form concerning frequent intermittent P0401 proves that the EGR system in the biggest engineering debacle in the CJAA 140 CR TDI, and VW should feel shameful for putting such crappy systems in their cars.

2017年10月1日 · TDI 2014 VW Sportwagen 2.0 TDi May 8, 2021 #14 Couldn't ... today got P2002 and P0401 on my Golf TDI 2011 ...

2014年2月1日 · I think I've diagnosed this correctly, but I'd love for confirmation. P0401 - EGR System insufficient flow -Tested vacuum to the N18 valve. ~22in/hg -Had someone operate the throttle while I observed the EGR valve - actuator did not move, no matter what was done with the throttle -Tested...

2020年3月1日 · 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 fix done, about 70,000 to 80,000 miles ago, give or take a bit. I honestly don't remember exactly when we did it, but I know the car had less than 120K ...

2016年10月22日 · P046F, P0477, P048A, P048B, P048C, P0401. Some TDI-CR engines have a filter for the Exhaust Gas Recirculation (EGR) that can become restricted and cause a "Insufficient Flow" code. When this fault is stored in a 2009-2014 North American Region (NAR) market 2.0L CR TDI (CBEA or CJAA ) VW Jetta/Golf (1K/AJ).

P046F, P0477, P048A, P048B, P048C, P0401. Some TDI-CR engines have a filter for the Exhaust Gas Recirculation (EGR) that can become restricted and cause a "Insufficient Flow" code. When this fault is stored in a 2009-2014 North American Region (NAR) market 2.0L CR TDI (CBEA or CJAA ) VW Jetta/Golf (1K/AJ).

2001年12月11日 · VW TDI Discussion Areas. TDI 101 Engine code P0401. Thread ... On the ALH TDI P0401 mean EGR Insufficient ...

2012年2月24日 · I can't find a solution to this problem. 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 wanted to see if it would solve the problem but unfortunately, it didn't.

2023年5月31日 · 2010 VW Jetta CJAA TDI throwing both codes. Removed EGR and cleaned. Opened cover to verify valve opens smoothly by turning the gears. Ran output test on VCDS to find out valve only opens a tiny bit. Carefully tested it with 12v and it works 100%. Seen another thread where someone had this happen on an Audi with no answer.