MK5 Golf GTI

All Things Mk5 => How to Guides / Troubleshooting => Topic started by: MKMike on June 02, 2021, 02:47:21 pm

Title: Boost pressure regulation control
Post by: MKMike on June 02, 2021, 02:47:21 pm

Hi,

Has anyone got experience with the below codes?

(https://i.ibb.co/8cMbqVV/IMG-20210602-095952.jpg)

I've recently had a new turbo pipe and seal fitted by VW but the issue is still there. Will be calling them again when I get the chance. The indi that got me these codes said they need to get someone in to smoke test it.

Title: Re: Boost pressure regulation control
Post by: pudding on June 04, 2021, 11:54:59 pm

Clear the codes first and see what comes back because the first code could be related to the recent work.

If not, first code is usually a split diverter valve or worn out boost O rings.  Failing that, N75 valve not working or worn turbo/wastegate penny valve.

Second and third codes are related to the EVAP system.  Usually the N80 solenoid stuck open causing a lean condition. Sometimes a new carbon can is also required to shift the third code.