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2005 Pontiac Grand Prix 3.8L MIL Lamp on
Customer brought in the car with a check engine light on, po420, we thermal tested the cat & found a 30 degree rise in temp, front to back, replaced the converter, roadtested and the code came back within 20 miles, we monitored the o2 sensors and found a glitc...
FIX posted 6/23/2010
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Message Closed w/FIX
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18 Replies Received
18 Replies Received
Related Documents & Media | VIN | 2G2WP52205 |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / MPFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Misc. | Po420 |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
2005 Pontiac Grand Prix
| VIN | 2G2WP52205 |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / MPFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Misc. | Po420 |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
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