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1991 olds ciera 3.3 OBD code 42?

Updated: 10/22/2022
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14y ago

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Code 42 is : Electronic Spark Timing Curcuit (EST), Direct Ignition System (DIS) fault- bypass curcuit open or shorted to ground or, Fuel cutoff relay curcuit open- or shorted to ground. I have the exact sam problem so If you find anything please post it. Thanks

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Q: 1991 olds ciera 3.3 OBD code 42?
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