
2011 GMC Sierra 1500 SLT 5.3L Excessive Emissions, Poor Idle Quality, Runs rich until full
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... ![]()
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VIN | 3GTP2WE38B |
Engine | 5.3 L / 8 cyl / FLEX |
Trans | 6-speed Automatic (Electronic) |
Delivery | Fuel Injection |
Emissions | OBD-II Compliant |
Symptoms | Excessive Emissions, Poor Idle Quality, Runs Rich Until Full |
Occurs | Cold, Idle |
Misc. | Flex Fuel |
Trouble Codes
P0106 | Manifold Air Pressure Sensor Range/Performance |
P0171 | Fuel System Too Lean (Bank 1) |
P0174 | Fuel System Too Lean (Bank 2) |
P0336 | CKP Sensor 1 Circuit Intermittent Signal |
P0463 | Fuel Level Sensor Circuit High Voltage |
P0877 | Transmission Fluid Pressure Switch 4 Circuit Low Voltage |
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Vehicle Data
2011 GMC Sierra 1500 SLT
VIN | 3GTP2WE38B |
Engine | 5.3 L / 8 cyl / FLEX |
Trans | 6-speed Automatic (Electronic) |
Delivery | Fuel Injection |
Emissions | OBD-II Compliant |
Symptoms | Excessive Emissions, Poor Idle Quality, Runs Rich Until Full |
Occurs | Cold, Idle |
Misc. | Flex Fuel |
Trouble Codes
P0106 | Manifold Air Pressure Sensor Range/Performance |
P0171 | Fuel System Too Lean (Bank 1) |
P0174 | Fuel System Too Lean (Bank 2) |
P0336 | CKP Sensor 1 Circuit Intermittent Signal |
P0463 | Fuel Level Sensor Circuit High Voltage |
P0877 | Transmission Fluid Pressure Switch 4 Circuit Low Voltage |