P1174 BMW - 1997 318i

Question

where is p1174 fuel trim on a 318i bmw

Answer 1

P1174 Fuel trim range performance problem

Fuel trim is not a part but a situation that where fuel and air is out of balance, The most common cause of this is from a vacuum leak,especially at the MAF (Mass air flow) intake air duct, or even a disconnected vacuum hose,Also look at the brake booster hose connection for vacuum leak