P0170 Fuel Trim Malfunction The Definitive Guide to Diagnosis and Repair

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 ... Minivan, SUV, & Truck - P0170: Fuel trim malfuction (bank 1), P0172: System too rich (bank 1) - My Odyssey (2001) is running rough, ... I am experiencing rough start and idle, usually the 2nd start of the day and CEL comes on. It will clear for a day, then come back. It is showing a P0170 code, ... There is a limit to how much the ECM can trim the fuel mixture and when the limit is reached for a specific amount of time the ECM will set the ... 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 ... Evo General - Code No. P0170: Abnormal Fuel System - hello, well as the title says, i have a check light on my evo 7 saying abnormal fuel ... DTC Code P0170 indicates a Fuel Trim Malfunction, where the Engine Control Module (ECM) detects an imbalance in the air-fuel mixture. Symptoms for Fault Code ... The code means the fuel trim has reached it's adaption limits (-30/+50% according to the info above). The first step to diagnosing the problem ... 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 ... It could be the MAF or it could be a vacuum leak. The way to find out is to read live data with a scan tool that can do that.