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1998 Pontiac Grand Prix SE 3.1L MIL Lamp on
Please help,this grand am has code PO420,testing seems rather vague and passes test at this time.I also have a 1999 astro w/same [...] help would be appreciated.
Summary posted 3/13/2003
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Related Documents & Media | VIN | 1G2WJ52M2W |
| Engine | 3.1 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| 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
1998 Pontiac Grand Prix SE
| VIN | 1G2WJ52M2W |
| Engine | 3.1 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Intermittently |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
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