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1999 Chevrolet Malibu LS 3.1L MIL Lamp on
All readings appear to be normal. Customer complained of engine running rough on cold start, that was corrected after tune-up. Down stream O2 is switching at about half the rate of the upstream O2. Owner stated that MIL was on for about a week, but went out wh...
FIX posted 1/26/2003
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Message Closed w/FIX
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12 Replies Received
12 Replies Received
Related Documents & Media | VIN | 1G1NE52M6X |
| 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/FIX
Vehicle Data
1999 Chevrolet Malibu LS
| VIN | 1G1NE52M6X |
| 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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