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1990 Cadillac DeVille 4.5L MIL Lamp on
Posted to GM Driveability on 11/23/1999

I checked the whole system out, I test the air deverter valve, seems ok. I can make the deverter valve to open and close by using onboard computer. Air pump and check valve are brand new. Could it be cat. converter?anybody knows the solution,will be apreci...

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car Vehicle Data

1990 Cadillac DeVille

VIN [No VIN Available]
Engine4.5 L / 8 cyl
SymptomsMIL Lamp On
OccursCruise
Misc.2 Doors Fwd

Trouble Codes

49air manegment system
E
Message Closed

car Vehicle Data

1990 Cadillac DeVille

VIN [No VIN Available]
Engine4.5 L / 8 cyl
SymptomsMIL Lamp On
OccursCruise
Misc.2 Doors Fwd

Trouble Codes

49air manegment system
E