car won't shut off

Asked by mb266881 Jan 31, 2019 at 08:22 PM about the 1945 Jeep CJ-2A

Question type: Maintenance & Repair

What is a PCM

1 Answer
43,990

Hornet_2497 answered 5 years ago

A PCM is a Powertrain Control Module, or "engine computer" it is often called. They came about in the 1980's in one form or another. They are currently very complex, controlling every function of a vehicle. Your Jeep ignition switch must not be cutting off electricity to the ignition if it won't shut off.

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