Oldsmobile 88 P Codes (Powertrain)

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Po420 Code

1999 OLDSMOBILE 88
I Had Random Misfire Code But I Fixed It By Replacing A Faulty Coil. I Have No Miss, But I Now Have A Po420 Code. Replaced Up And Down...
1 ANSWER
Asked by Ronald Franklin

Check Engine Light And Code P0401

1997 OLDSMOBILE 88
My Car Is Giving A P0401 Code. I've Replaced The Following Parts. Egr Valve Pcv Valve As A Kit Map Sensor Mass Airflow Sensor All...
1 ANSWER
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Asked by Robert Sanderson Jr.

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