2011 Chevrolet Impala LS 3.5L Excessive Emissions, Poor Idle Quality
Customer is complaining of a rough running condition on the first start up when the vehicle is cold everyday. We verified this problem. Once it warns up it goes away. The pcm is backing off the fuel trims -25%. We pulled the fuel rail to make sure we did n...
FIX posted 12/6/2017
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Message Closed w/FIX
Vehicle Data2011 Chevrolet Impala LS
Trouble Codes
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Message Closed w/FIX
Vehicle Data
2011 Chevrolet Impala LS
VIN | 2G1WG5EK1B |
Engine | 3.5 L / 6 cyl / FLEX |
Trans | 4-speed Automatic (Electronic) |
Delivery | Fuel Injection |
Emissions | OBD-II Compliant |
Symptoms | Excessive Emissions, Poor Idle Quality |
Occurs | Cold |
Trouble Codes
P0172 | Fuel System Too Rich (Bank 1) |