JimboM

Hi

I’ve got a recurring fault with my Focus and hoping someone can point me in the right direction. Vehicle is a 58 plate Focus 1.8 Tdci Style Estate with 95k on the clock. It starts and pulls away fine but as soon as I accelerate a bit harder the Engine Malfunction warning flashes up and the little red ‘i’ is lit on the dash. It’s not going into limp mode (or at least I can rev past 3,000rpm) but power does seem to be a bit down. Occasionally the orange engine warning light lights up as well and this will stay illuminated each time the engine is started until I clear it manually.

I’ve plugged in a generic OBD reader which shows no codes, but Forscan reports

PCM Module
P010F-F1 Mass or volume air flow sensor A/B Correlation
P0299-F1 Turbocharger/supercharger underboost

OBDII Module
P010F-C Mass or volume air flow sensor A/B Correlation


From that the MAF sensor would appear to be the first place to check\replace - I'll obviously give it a look over but is there any sort of testing or voltages I could check for to see if it's working properly.

Also I know DTC codes can often give a misleading indication of the fault so is this the most likely culprit or should I be looking elsewhere?

Thanks

hakils

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Glenn_

iTrader: (1)

Have you had the sensor out and used some brake cleaner to clean it. My mondeo diesel donkey has done this before. The car hesitates then the engine light comes on.