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2003 Chevrolet Impala LS 3.8L MIL Lamp on
repeat P0420 [...] conv 3x. no coolant loss,uses 1 qt oil per service, replaced o2 both,conv temp 550 frt/650+ rear, hot rear O2 [...] fairly flatline. calc load max of 87%. when code stores(freeze frame)closed loop,LTFT has been 126 and 129 not right rpm 657,...
Summary posted 10/3/2012
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Related Documents & Media | VIN | 2G1WH52K13 |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Intermittently |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/Summary
Vehicle Data
2003 Chevrolet Impala LS
| VIN | 2G1WH52K13 |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Intermittently |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
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