P0170 Fuel Trim Malfunction The Essential Diagnostic Guide for Mechanics and DIYers

The P0170 code means that the powertrain control module is detecting a fuel trim that is outside the range of specification set by the vehicle's ... Steps taken: Thoroughly cleaned out throttle body. Pulled and cleaned the MAF sensor. Both with the appropriate cleaners. Cannot find any leaks, ... I have this code. I changed the MAF sensor because the EGR valve is working and spraying carb cleaner around the intake gasket had no effect. Its either getting too much fuel or not enough air, but this could be due to all sorts of sensors, coil packs, filters, etc etc! any help/advice much ... It sounds like you might have an exhaust leak. This causes the O2 sensor to think you have a lean run condition and fattens up the fuel mixture which causes a ... The fault code P0170 can be caused by parts like the fuel filter, fuel pressure regulator or the air mass meter. The adaptive values in the ECU are adjusted so ... P0170 means there was a malfunction in the computer's control of the air:fuel ratio. It also indicates that the fuel trims reached their limit of adding fuel. It reads like the engine is overfuelling, how old is the car ? it's recommended to replace the oxygen (lambda) sensors every ten years or so. Code P0170 (Fuel Trim Balance Malfunction Bank 1) and it fired twice. 2 months ago it fired P0174 (Bank 2 too lean) Has anyone else had this issue? A fuel trim where the ECU is trying to add fuel would be a good indication of fuel starvation at idle. ;) I don't think yer O2 sensors are ...