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2000 Pontiac Grand Prix SE 3.1L MIL Lamp on
Posted to GM Driveability on 7/6/2008 34 Replies

Hello all

I have this GP that I installed an aftermarket cat on {Walker} less than 10000 miles ago. Randomly, the MIL will come on, indicating the cat isn't doing the job.I also personally own an 02 Impala that does the same thing, and that car had a GM cat p...

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  Related Documents & Media  2000 Pontiac Grand Prix SE

 
Message Closed

car Vehicle Data

2000 Pontiac Grand Prix SE

VIN 1G2WK52J13
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIntermittently

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
Message Closed

car Vehicle Data

2000 Pontiac Grand Prix SE

VIN 1G2WK52J13
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIntermittently

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)