Engine-Codes
 
OBDII Code List
 
B12C4 MERCURY

B12C4 MERCURY - Mirror Turn Indicator Circuit Short

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

B12C4 MERCURY Possible Causes

  • Faulty Mirror Turn Indicator
  • Mirror Turn Indicator harness is open or shorted
  • Mirror Turn Indicator circuit poor electrical connection
  • Faulty Driver Door Module (DDM)

How do I fix code B12C4 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.

B12C4 MERCURY Tech Notes

B12C4:11 Mirror Turn Indicator Circuit Short To Ground
B12C4:15 Mirror Turn Indicator Circuit Short To Battery Or Open

Cost of diagnosing the B12C4 MERCURY code

    Labor: 1.0

    The cost of diagnosing the B12C4 MERCURY code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

B12C4 MERCURY Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B12C4 MERCURY Meaning

The Driver Door Module (DDM) monitors the Mirror Turn Indicator Circuit. The DDM sets the OBDII code when the Mirror Turn Indicator Circuit is not to factory specifications.
OBDII Code B12C4 MERCURY - Mirror Turn Indicator Circuit Short - Engine-Codes.com

B12C4 MERCURY More Information

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