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Author Topic: underboost and 02 sensor faults  (Read 1380 times)

Offline cutchie

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underboost and 02 sensor faults
« on: September 04, 2015, 09:28:02 pm »
Hello from n.Ireland! First post going to put a build thread up once I figure out how! Lol.

so I have an 05 mk5 gti performance mods decat downpipr and oversize ramair. I have a generic fault code reader which is given p0030 and p2243 (bank 1 sensor 1 heater control circuit and 02 sensor referance voltage faults) and replaceing the 02 sensor didn't help can anyone shed any light?

Also on probably unrelated note I got the car plugged in on a snapon reader and it was showing p0299 fault (underboost) I've changed the dumpvalve and cleaned the maf sensor also checked the pcv anyone seen this before? The car also backfires a lot especially when it's cold.

Any help on either subject would be greatly appreciated! Thanks!

Offline cutchie

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Re: underboost and 02 sensor faults
« Reply #1 on: September 09, 2015, 10:54:10 pm »
Any help would be very appreciated!