P0172 Diagnostic Trouble Code Discussion for February 2016
Fuel System Rich (Bank 1)
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| Help Request | Posted | |
| 2012 GMC Sierra 2500 HD SLE 6.0L Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GT220CG6C P0172: Fuel trim rich bank one. This truck runs fine cold. No issues in open loop operation. After warm up with closed loop and extended idle, P0137 occurs and shortly after idle quality suffers. ST Fuel trims hit -20 to -24% and LT trims are pinned at -27%. Bank 1 sensor 1 sits around 440-4... |
February 10, 2016 | |
| 2012 GMC Sierra 2500 HD SLE 6.0L Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GT220CG6C P0172: Fuel trim rich bank one. This truck runs fine cold. No issues in open loop operation. After warm up with closed loop and extended idle, P0137 occurs and shortly after idle quality suffers. ST Fuel trims hit -20 to -24% and LT trims are pinned at -27%. Bank 1 sensor 1 sits around 440-4... |
February 11, 2016 |
