P0170 Fuel Trim Malfunction The Ultimate Diagnostic and Repair Guide

P0170 and P0173 means that the system tried to go outside of the fuel trim limits. Now this can be usually caused by a bad mass airflow sensor, ... mine was bad front 02 sensor. If you have a pocket logger then pulg it in and see what the sensors operating range is. If its not moving at all ... This thing comes and goes on me time to time with weird idle supposingly it happens if you put to much gas in the car or don't lock the gascap properly. 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 ... I pulled the codes P0170 Fuel Trim Malfunction, (Bank 1) which many posts point to the dreaded MAF (Mass Airflow Sensor) sensor failure. Also ... First off I have a 04 330ci. I get one and only fault code: P0170 Fuel Trim Malfunction (Bank 1). My car has 66k miles. Interestingly, I was ... Motorbike Professor ... More likely happened each time you started it (cold) after the exhaust gaskets were blown, not during the long ride. Not a ... This code rarely happens in Asian and American-made cars. For American cars, the most common fuel trim error codes are P0171, P0174, P0172, P0175. Your code is "Fuel trim malfunction (bank 1) " , so this means your problem is likely to be your O2 sensor on your driver's side of the engine, ... The most common problem for fuel trim fault codes is a faulty MAF (air mass) sensor. As the sensor fails the ECU will try to adapt as much as possible.