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2002 Pontiac Grand Prix SE 3.1L Excessive Emissions, Misfire, MIL Lamp on
Came in with a p0420. Replaced cat, came back aprox 500 mi later with same code, replace cat again with a OE unit, and new front and rear O2's. Back again with p0420 and p0300 after aprox 50 mi. Cyl #4 has a very slight miss, cant feel it but the verus is show...
FIX posted 5/8/2013
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Message Closed
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15 Replies Received
15 Replies Received
Related Documents & Media | VIN | 1G2WK52J32 |
| Engine | 3.1 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Excessive Emissions, Misfire, MIL Lamp On |
| Occurs | Idle, Intermittently |
Trouble Codes
| P0300 | Multiple Misfire Detected |
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed
Vehicle Data
2002 Pontiac Grand Prix SE
| VIN | 1G2WK52J32 |
| Engine | 3.1 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Excessive Emissions, Misfire, MIL Lamp On |
| Occurs | Idle, Intermittently |
Trouble Codes
| P0300 | Multiple Misfire Detected |
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Video