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1998 Mercury Grand Marquis LS 4.6L MIL Lamp on
Car runns great, Check engine light comes on showing code PO420 all test are within specs, fuel trim good 02 read good, emmission Fast passed. if you clear the code customer drives for about a week Around town driving then the light comes back on with same cod...
FIX posted 3/30/2003
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Message Closed w/FIX
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19 Replies Received
19 Replies Received
Related Documents & Media | VIN | 2MEFM75W3W |
| Engine | 4.6 L / 8 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
1998 Mercury Grand Marquis LS
| VIN | 2MEFM75W3W |
| Engine | 4.6 L / 8 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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