Fuel Trim Malfunction (P0170) Your Complete Troubleshooting and Repair Manual

16554 P0170 035 Fuel Trin, Bank 1 Malfunction Possible causes: Air leaks - Map, TB gaskets?? Lambada - Clean or Replace any other possibilities? 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. You are running outside optimal fuel trim. There is a probably an air leak somewhere in your intake system (MAF, vacuum leak, o2 sensor not ... A fuel trim malfunction indicates that the FI system cannot fully compensate for either a rich or lean condition. Diagnostic Trouble Code Detecting Condition. Trouble Area. DTC No. P0170. –. 2RZ–FE 3RZ–FE ENGINE. ENGINE TROUBLESHOOTING. EG1–250 ... P0170 indicates a fuel trim malfunction in Bank 1 of the engine. This means the engine control module (ECM) is having difficulty maintaining the ... Hi All, I currently have trouble codes P0133 and P0170 Bank 1 sensor 1 slow response Bank 1 fuel trim I have been battling the P0133 and P0170 ... Long term fuel trim is down to 14.8 now, which seems to fix the CEL, but it's idling like poop now. Sputters a lot. VW DTC P0170 - Fuel Trim, Bank1 Malfunction. That would be the ECU informing you that the air / fuel mixture coming out of your engine is off, way off. That is a fuel trim error, not just related to MAF, but vacuum leaks, bad O2 sensor, Oil contamination in MAF connector or O2 sensor connectors.