MK5 Golf GTI

All Things Mk5 => How to Guides / Troubleshooting => Topic started by: Octoparrot on July 02, 2021, 10:30:02 pm

Title: Poor idle
Post by: Octoparrot on July 02, 2021, 10:30:02 pm

My car has suddenly started idling poorly, got a code from vcds of p2279 air leak, does this sound like a failed pcv valve?

Title: Re: Poor idle
Post by: pudding on July 02, 2021, 11:46:33 pm

That is certainly a potential culprit. If the PCV valve is stuck open, it will definitely cause an air leak.

Title: Re: Poor idle
Post by: JoshB on July 11, 2021, 08:56:04 am

I think P2279 is to do with your diverter valve. Does it pull alright?

Title: Re: Poor idle
Post by: GVK on July 11, 2021, 08:59:11 am

is intake air leak so check the PCV, the PCV gasket and the brake servo pipe work. Spray WD40 at the suspected leak and the engine will suck it in raising the idle.

Title: Re: Poor idle
Post by: JoshB on July 11, 2021, 09:02:15 am

This might help
https://www.obd-codes.com/p2279

Title: Re: Poor idle
Post by: Octoparrot on July 11, 2021, 11:35:55 am

Well I deleted the code and it hasn't come back, the car ran fine all this week but I have changed the pcv and gasket just in case. The pcv was the original but seemed to be working fine when removed. Odd  :thinking:

Title: Re: Poor idle
Post by: GVK on July 11, 2021, 01:00:22 pm

it's fixed, carry on :P