P 0171 is a very common fault code on this engine.Very often there is no noticeable loss of performance or engine running issues.This fault is usually flagged if there are any air leaks in the intake system,especially the breather pipes that run along the back of the engine or the round breather valve that is located on the inlet manifold.Also check that the dipstick and oil filler cap are sealing correctly.Another possible cause is the air mass sensor out of calibration.hth
well did have a little drive again last night slugish on pullaway but then giving it some welly didnt seem so bad will check oil dipstick. when the engine was on computer it picked up low vaules on one not going above 1 the others were peaking at 2.1 ish what test was this injectors?or cylinders did let the car run low on fuel 300 miles ago but things were fine many thanks for any input,...
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