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Did you check the out going pins for those sensor? If the voltage is above 5 volts going out, then the issue is in the ECM itself. If the voltage is 5 going out, but getting higher coming back, then you have a harness issue or a battery cable grounding to the engine block.
That needs to be narrowed down and you'll then get the answer to why you have the high voltage coming back.
Check the sensors, the voltage going in to the sensors, then the voltage at the pins. Remove the pin with a pin removal tool and ten you can be certain you are not getting ECM issues by backfeeding or feeding the wrong voltage out.
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