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intermittent turbo and faulty map sensor G42

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So here I am again, searching for yet another solution to another problem with my MK2 Octavia TDI. I think i know what the problem is but i would really appreciate all of your inputs and suggestions.

The turbo has become intermittent, sometimes it boosts and sometimes its as dead as a dodo. The only fault code coming up is 16497 Intake Air Temp. Sensor (G42): Signal too High. So, assuming that was the culprit i have replaced the sensor with a brand new one, problem persists...!

I have read on a few threads there is a common fault with the wiring positioned under the airbox.Before i go un-bolting most of my engine bay i was wondering if anyone else on here has had the problem and could guide me to the problem quicker. or has anone seen a guide with some pics about this anywhere?

There is also talk about the MAF sensor being responsible but i am not getting any other fault codes?

Please help, i am being forced into driving like an old man on a Sunday afternoon....!

  • Author

surely someone has heard of this issue before..?

  • 1 year later...

anyone ?

Yup sounds like intermittent wiring issue then, trace the wires back as far as you can. There was a thread on here with the correct resistances that should be obtained on resistance checking the maf sensor. But anyone with VCDS and a bit of time can log the data see if it is plausible.

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