Off Road Indicator Circuit
Table of contents
B12E0 MERCURY Possible Causes
- Faulty Off-Road Mode Switch
- Off-Road Mode Switch harness is open or shorted
- Off-Road Mode Switch circuit poor electrical connection
- Faulty Transfer Case Control Module (TCCM)
How do I fix code B12E0 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.
Tech Notes
- B12E0:11 Off Road Indicator Circuit Short to Ground
- B12E0:12 Off Road Indicator Circuit Short to Battery
- B12E0:13 Off Road Indicator Circuit Open
Cost of diagnosing the B12E0 MERCURY code
The cost of diagnosing the B12E0 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)
B12E0 MERCURY Description
When the off-road switch is depressed, a signal is sent to the Transfer Case Control Module (TCCM) which alerts other modules along the HS-CAN that off-road mode is being requested. Other vehicle functions change to accommodate off-road mode and an indicator illuminates on the Off-Road Mode Switch confirming off-road mode. The OBDII code sets when in Off-Road Mode, the TCCM senses the indicator lamp circuit is not to factory specifications.