1998 bmw 318i p1174 code

Question

i have 1998 bmw 318i it keep show p1174 i changed the o2 sensor and the cranke vent valve i spray to see any vacume leak nothing i can find it drive me nuts and my inspection is few days away i even changed the oil valve cover gasket and air filter please i need help

Answer 1

P1174 Fuel trim adaptation additive bank 1 malfunction

P1174 is caused by unmetered air causing a lean condition,Do a MAF (mass airflow cleaning), see if that works, if not you will need to measure the fuel pressure,should be about 0.2 bars to 3.0 bars