Well I can see the first code on the list (P068A-00) being the cause of the other codes setting. Low voltage to one or more sections of the ECM can cause all sorts of circuits to read inaccurately. Thats the the one I would diagnose first.
Heres some service info to go with the ECM power relay code. That area, including the fuse box where that relay lives are suspect. Many of these fuses boxes have power bus bars all soldered together and they can crack internally causing intermittent issues due to thermal expansion of cracked solder.
The diagrams above still apply. You need to monitor that relay and see if its de-activating too early or maybe not at all. I would monitor the ECM's input voltage levels using more than just a scan tool. While looking at live ECM data you can compare your readings with a multimeter and what the scan tool reads to find discrepancies, always back up your scan tool data with another source, ie a multimeter, oscilloscope, etc.
Let us know what you find.
https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit
https://www.2carpros.com/articles/how-to-use-a-voltmeter
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Mar 14, 2026 at 12:03 PM