My Volvo S40 2.0T (2000 X Reg)has had the engine management light on for several months now. It has been to the garage 6 times and they plug it into their diagnostics machine which comes up with 3 different codes "mixture adaption" "P0102 Mass or Volume Air Flow Circuit Low Input" and "P0171 System too Lean Bank 1". I have had a new Mass Air Meter and a new oxygen sensor in the exhaust and the light reset. Had this problem on last car (Volvo S40 2.0T 1999) but a new mass air meter fixed it. The garage have said they will do a bit of research. Last time they serviced it (51000 miles) it only had codes P0171 and P0102, not mixture adaption.
I've checked the earths. Anything else I can try?
Hi, Since you have both codes Fuel system lean and MAF low I would bet money on that you have an intake air leak after the throttle. Check all hoses connected to the intake manifold, gaskets, injectors are put in place etc.
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