Check for the following conditions:
Poor connection or damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, observe the Ignition 1 voltage display on the scan tool while moving connectors and wiring related to the PCM, dash harness, and engine harness. A change in the display will indicate the location of the fault.
If DTC P0506 cannot be duplicated, reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
The orange wire runs from the fuse box to the PCM and the code is telling you the voltage is incorrect.
Find out why. Does the fuse match the battery voltage? Maybe an issue with the fuse box or wiring.
Friday, November 6th, 2015 AT 9:53 AM