2008 Mk2 - code P 0171
03-04-2018, 10:17 AM
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2008 Mk2 - code P 0171
I just bought a 2.0 turbo 2008 TT (mk2)
Couple of days later the P 0171 bank 1 system too lean came up. I cleaned the air intake, MFA sensor, new engine air filter.. What should be the next step?
Couple of days later the P 0171 bank 1 system too lean came up. I cleaned the air intake, MFA sensor, new engine air filter.. What should be the next step?
05-12-2018, 06:20 PM
#2
99% of time that is caused by a failed PCV/check valve. It causes pressurized air from the turbo to enter the crankcase. Causes that code as well as other issues such as forcing oil out the valve cover or oil cap, and will cause oil to be pushed into the intake side of turbo, filling the intercooler.
This kit will fix it: https://www.europaparts.com/breather...-fsi-late.html
This kit will fix it: https://www.europaparts.com/breather...-fsi-late.html
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