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1994 Pontiac Bonneville 3.8L MIL Lamp on
Posted to GM Driveability on 8/5/1999

Replaced intake gasket and front seal for oil leak. Routine job. Start car and have 2500 rpm idle and mil on. Check codes and voila, 1640,1650 and 1670. All quad modules. Can't imagine what caused this. Checked wiring diagrams for common denominator and fo...

 
Message Closed w/FIX

car Vehicle Data

1994 Pontiac Bonneville

VIN 1GZHYS2L5R
Engine3.8 L / 6 cyl
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways, Idle

Trouble Codes

1640Quad module 1
1650Quad module 2
1670Quad module 4
Message Closed w/FIX

car Vehicle Data

1994 Pontiac Bonneville

VIN 1GZHYS2L5R
Engine3.8 L / 6 cyl
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways, Idle

Trouble Codes

1640Quad module 1
1650Quad module 2
1670Quad module 4