2001 Pontiac Grand Prix SE 3.8L MIL Lamp on
this vehicle came in no [...] sensor was open and cat was 1oo% [...] pids look ok. #420 will [...] it possible replacement cat is bad?
FIX posted 8/17/2004
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Message Closed w/FIX
Vehicle Data2001 Pontiac Grand Prix SE
Trouble Codes
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Message Closed w/FIX
Vehicle Data
2001 Pontiac Grand Prix SE
VIN | 1G2WP52KO1 |
Engine | 3.8 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | After Monitors Run |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |