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2003 Chevrolet Impala 3.4L Negative Fuel Trims
This vehicle came in with a check engine light and P0171 lean code set. I found two leaking vacuum lines which I repaired. I then monitored the fuel trims to make sure everything looked good and fuel trims started going negative. I discovered that if I dis...
FIX posted 9/1/2020
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Message Closed w/FIX
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15 Replies Received
15 Replies Received
Related Documents & Media | VIN | 2G1WF52E33 |
| Engine | 3.4 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / MPFI |
| Emissions | OBD-II Compliant |
| Symptoms | Negative Fuel Trims |
| Occurs | Always |
Message Closed w/FIX
Vehicle Data
2003 Chevrolet Impala
| VIN | 2G1WF52E33 |
| Engine | 3.4 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / MPFI |
| Emissions | OBD-II Compliant |
| Symptoms | Negative Fuel Trims |
| Occurs | Always |
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