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1998 Oldsmobile Achieva S 3.1L MIL Lamp on
We replaced the catalytic converter with an AP OBDII compliant converter. The code came back. We replaced the upstream oxygen sensor. The code came back after 40 miles. If we replace the catalytic converter with a Walker or a Magnaflow direct fit converter, do...
Summary posted 2/14/2013
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Related Documents & Media | VIN | 1G3NL52MXW |
| Engine | 3.1 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Misc. | P0420 |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/Summary
Vehicle Data
1998 Oldsmobile Achieva S
| VIN | 1G3NL52MXW |
| Engine | 3.1 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Misc. | P0420 |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
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