Conquering P0170 Fuel Trim Malfunction Repair in a Nutshell

The p0170 code refers purely to the fuel mixture (air/fuel ratio) but without stating which way it's going. p0171 is mixture to lean and P0172 is too rich. 'P0170' Fuel Trim Malfunction Bank 1 Legacy Forum. Running rich ... But not really p0170 and p0172 · 1) Fuel pressure too high · 2) O2 sensor stuck rich (above 450mV) It should cycle between 100 ... 5 volt, if the entire fluctuation range is low then vacuum leak. Look at the worst high and low and compare. Vacuum leak they will tend to hang ... P0170 indicates a fuel trim malfunction in Bank 1 of the engine. This means the engine control module (ECM) is having difficulty maintaining the ... Possible causes for fault code P0101 = ECM130A Air leakage to induction system, Dirty throttle body, Blocked crankcase ventilation or PCV nipple, Faulty MAF. 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. I pulled the codes P0170 Fuel Trim Malfunction, (Bank 1) which many posts point to the dreaded MAF (Mass Airflow Sensor) sensor failure. Also ... Author Topic: Fault Code P0170 (Read 4289 times). 0 Members and 1 Guest are viewing this topic. Sp4rkst4rt3r. Newbie; * ... Steps taken: Thoroughly cleaned out throttle body. Pulled and cleaned the MAF sensor. Both with the appropriate cleaners. Cannot find any leaks, ...