Check for other Powertrain Control Module (PCM) codes or PCM related symptoms. Diagnose all other PCM codes or PCM related symptoms first.
Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
The cost to diagnose the U05A0 Mercury code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
The Diagnostic Trouble Code (DTC) will set when a network concerns occur during module-to-module communication.
- Invalid data network concerns are set when data is transferred within the normal inter-module message but contains known invalid data. The transmitting module logs a DTC related to the invalid data concern.
- Missing message network concerns are set when missing message concerns are logged by the module upon failure to receive a message from another module within a defined retry period.
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