Quote:
Originally Posted by Zebster
The reduced performance/tortoise warning lamp is not just for EGR issues. However I reckon that the low MAF may be indicating that the EGR valve is failing to properly close. Or maybe the MAF sensor is simply dirty or failing? Or there's a leak on the intake side?
Isolating (blocking) the EGR flow with, say, a cut-up drinks can would prove that the valve is failing to close, although would then of course replicate a blocked cooler and give the P04d9 error code. A useful diagnostic though.
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Zebster,
Thank you. Will do some investigating this weekend to see if I can narrow it down some more.
Gavin