Immediate Shutdown Signal
Table of contents
P1A0A MERCURY Possible Causes
- Immediate Shutdown (ISDN) Circuit
- Faulty Transmission Control Module (TCM)
- Faulty Trailer Brake Control Module (TBCM)
How do I fix code P1A0A MERCURY?
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’s pins.
Cost of diagnosing the P1A0A MERCURY code
The cost of diagnosing the P1A0A MERCURY code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1A0A MERCURY Description
The Transmission Control Module (TCM) monitors 2 redundant Immediate Shutdown (ISDN) inputs from the Trailer Brake Control Module (TBCM). When the Transmission Control Module (TCM) detects one or both inputs out of the expected range this code is set.