P0174 Diagnostic Trouble Code Discussion for January 2025
Fuel System Lean (Bank 2)
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| Help Request | Posted | |
| 2011 GMC Sierra 1500 SLT 5.3L Excessive Emissions, Poor Idle Quality, Runs rich until full VIN: 3GTP2WE38B P0174: Fuel trim lean bank 2. Vehicle runs excessively rich when cold. Fuel trims as high as plus 29 percent long term and plus 30 percent short term. Mass air running around 14 g/s and calculated air flow around 24 g/s Sometimes it will not idle down running up to around 3000 rpm. IAT... |
January 22, 2025 |
