I've noticed that my ECM voltage gradually drops within the past couple of days.
After driving for 2 hours, it dropped from 14.375 to almost 14.188.
The thing is that this voltage matches up with the voltage desired PID.
Does the desired value change to a lower value when it thinks it can't reach a higher value?
Or does the ECM voltage drop to meet the new lowered desired value?
Why is the desired value dropping slowly if it's the second option?
I have a 2017 RAM 2500 for reference.
I cleaned all the posts on my batteries, and I couldn't see anything unplugged or loose from a top-down look.
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