Check engine with A/C on?

by **jurebv** » Wed Feb 21, 2018 7:56 pm

Hi, seems that im having strange problem after remapping, my car runs fine and there are no symptoms of anything except Check Engine light which comes on a while after driving with AC on (air conditioning) car runs normal, ac works...after i read error with VCDS i see 000257 mass air flow sensor p0101 000 implausible signal

Happens ONLY with remap and ONLY with AC on.

Car is 2008 edc16u34 seat leon 1.9tdi pd

Any ideas? (Except with driving with ac off :D)

Best Regards

by **ominimicu** » Thu Feb 22, 2018 8:09 pm

DId u also do egr off?

by **jurebv** » Fri Feb 23, 2018 10:44 am

Yeah egr's off.

by **jurebv** » Tue Feb 27, 2018 10:45 am

actually found out its not AC related but happens randomly, actually most often it happens when driving with no throttle (downhill) with RPMs dropping (example from 2500-1500)