2001 Mitsubishi Montero Sport ES 3.0L MIL Lamp on
owner has been driving with the mil light on since 2003,
and has replaced cat converter in 04 and pcm in 03. we
replaced rear o2 sensor in 04. sensors appear to be
operating normally, rich/lean on the front and relatively
"flat-line" on the rear o2 sensor.
FIX posted 11/26/2007
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Message Closed w/FIX
Vehicle Data2001 Mitsubishi Montero Sport ES
Trouble Codes
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Message Closed w/FIX
Vehicle Data
2001 Mitsubishi Montero Sport ES
VIN | JA4LS2AH61 |
Engine | 3.0 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Always |
Trouble Codes
P0421 | Catalytic Converter Efficiency (Bank 1) |