OK, when did this start happening? Right after battery replacement or service where the battery was disconnected? If yes try this, disconnect the battery, wait 5 minutes. Reconnect and start the engine, Shut it off, Now wait 5 minutes and try to start it again. If it starts and runs a short time, start it again and see if it stays running. This has been an issue on them for a long time. The battery disconnect causes it to lose all learned memory, then it restarts and will usually run like poo for a bit and shut down. Then it should repeat that and on the third try it writes the previous info to memory and now will run. If that isn't the case then we need to check the fuses that power the PCM to see if the KAM voltage is there.
A quick test would be to put a code reader on it that can check the status of the engine monitors and tell you if they are set. If it is that the PCM memory is being erased on shut down, those will all came back as not ready.
Probably the first thing would be to go to the fuse poxes and check all the fuses. If they test OK then we will look at the PCM power wires and see if they all have power, but test the fuses first and report back. For that you want a simple test light like the one shown.
https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
https://www.2carpros.com/articles/how-to-check-a-car-fuse
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Friday, August 15th, 2025 AT 12:31 AM
