Thread: P0340 code
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Old 10-02-2019, 05:41 PM   #13
billr
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Join Date: Jul 2013
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Default Re: P0340 code

I would expect an intermittent open in the wiring more than a short. Sure, wiring/connector problems are always a possibility, that is why parts-swapping may not be successful. Intermittent can be very elusive. You might want to try installing a redundant wire from the PCM connector to the ICM connector for that CMP signal wire.

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