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2002 Pontiac Grand Prix SE 3.1L MIL Lamp on
Posted to GM Driveability on 3/3/2009 11 Replies

Customer stated that MIL light is on and steady. Ran diagnostic reader and code of P0420 reported. Would there be anything logical that is causing the CAT to burn up? Is there anything else that I should look at besides the CAT itself?

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  Related Documents & Media  2002 Pontiac Grand Prix SE

 
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car Vehicle Data

2002 Pontiac Grand Prix SE

VIN 1G2WK52J42
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursSteady MIL Light

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
Message Closed

car Vehicle Data

2002 Pontiac Grand Prix SE

VIN 1G2WK52J42
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursSteady MIL Light

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)