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Code 42 is the ignition module faulty or loose connections.

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16y ago

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What is code 42 on 1992 Chevrolet caprice?

Code 42 on a 1992 Chevrolet Caprice typically indicates a problem with the Electronic Spark Control (ESC) system. This code often means there is a malfunction in the ESC module or a related component, which can affect engine performance and fuel efficiency. It’s advisable to check the ESC connections and wiring, as well as the module itself, to diagnose and resolve the issue.


How do you clear a code 42 on a 91 lumina apv that has a new distributor coil plugs and wires?

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1993 Grand Am 3.3L V6 (6-204) - Solved intermittent "Code 42 - electronic spark timing" issue by replacing Mass Air Flow sensor, after checking all wires in harness (and replacing some) between the ECM and ICM, checking all connections, and replacing all the other sensors. All work prior to replacing MAF sensor improved performance but did NOT solve intermittent Code 42 problem. Never got a "MAF sensor" Code 34.


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How do you fix code 42 on 1994 C2500?

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What does code 42 mean?

There is a problem in the Electronic Spark Timing System. 1993 3.3L V6 (6-204) - Solved intermittent "Code 42 - electronic spark timing" issue by replacing Mass Air Flow sensor, after checking all wires in harness (and replacing some) between the ECM and ICM, checking all connections, and replacing all the other sensors. All work prior to replacing MAF sensor improved performance but did NOT solve intermittent Code 42 problem. Never got a "MAF sensor" Code 34.