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2003 Pontiac Grand Prix GT 3.8L No Start, Hesitation, MIL Lamp on
Posted to GM Driveability on 6/28/2018 15 Replies

I have a 2003 grand prix here with a po120 and po420. The car will occasionally not start hot untill it sits for a few minutes, and they say it occasionally lacks alot of power. The fuel trims are -12 to -14 even when hot. I have driven the car hard, got i...

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car Vehicle Data

2003 Pontiac Grand Prix GT

VIN 1G2WP52K43
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsNo Start, Hesitation, MIL Lamp On
Message Closed

car Vehicle Data

2003 Pontiac Grand Prix GT

VIN 1G2WP52K43
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsNo Start, Hesitation, MIL Lamp On