p0401 and p2002 after DPF replacement.

aplsms

New member
Joined
Aug 3, 2023
Location
USA
TDI
Golf 2011 TDI
Hi all,

Still have a problem with p0401 and p2002 after DPF replacement.

2 year ego replaced fuel injectors and HPFP.
After replacement turbocharger (oil leaked to DPF and air intake), DPF (clogged by oil ash) and EGR valve.

In 2500 miles got the same errors: p0401 and p2002.
Check engine light turned off in 40 miles by itself.

is it make sense to replace DPF pressure sensor, EGR cooler and EGR filter?

Honestly say, I'm out of ideas...

Car: VW Golf TDI 2011, 6sp Manual.
 

oilhammer

Certified Volkswagen Nut & Vendor
Joined
Dec 11, 2001
Location
outside St Louis, MO
TDI
There are just too many to list....
When you replace the DPF and EGR pipe (I always do them together, because the cracked DPF causes the EGR tube to stop up with soot, and that is the failure mode most common) you have to then reset the ECU's DPF and EGR learned values, reset the differential pressure sensors, and do the Basic Settings.
 

aplsms

New member
Joined
Aug 3, 2023
Location
USA
TDI
Golf 2011 TDI
copy that. can you give me a bit more information, on how to reset "DPF and EGR learned values" and pressure sensor?
And what is "Basic settings"?

Thank you in advance.
 
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