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2001 Chevrolet Impala LS 3.8L MIL Lamp on
Vehicle owner complains of SES light on with no driveability issues. Code PO420 keeps returning. The previous shop has replaced the Catalytic Converter 3 times with a direct fit, installed both 02 sensors and a Mass Air Flow Sensor. The problem keeps returning...
FIX posted 10/1/2007
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Message Closed w/FIX
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12 Replies Received
12 Replies Received
Related Documents & Media | VIN | 2G1WH55K91 |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
2001 Chevrolet Impala LS
| VIN | 2G1WH55K91 |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
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