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1999 Pontiac Grand Prix GT 3.8L MIL Lamp on
Posted to GM Driveability on 10/4/2010 14 Replies

P0440 & p0449 keep setting after a couple minutes at idle. Already replaced fuel cap because the seal had visible cracks and was original. Also performed a smoke test found no leak in the system. Replaced what I thought was the fuel tank vent solenoid in the l...

14 Replies Received (View Replies)

  Related Documents & Media  1999 Pontiac Grand Prix GT

 
Message Closed w/FIX

car Vehicle Data

1999 Pontiac Grand Prix GT

VIN 1G2WP52K4X
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways
Misc.3.8L

Trouble Codes

P0440EVAP System Leak Detected
P0449PCM Internal Fault
Message Closed w/FIX

car Vehicle Data

1999 Pontiac Grand Prix GT

VIN 1G2WP52K4X
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways
Misc.3.8L

Trouble Codes

P0440EVAP System Leak Detected
P0449PCM Internal Fault