Engine-Codes - Mercury - B12E0 MERCURY

B12E0 MERCURY Code - Off Road Indicator Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

|B12E0 MERCURY code 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 is the B12E0 MERCURY code repair?

Start by checking 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.

|B12E0 MERCURY code 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

|What is the cost to diagnose the B12E0 MERCURY code

Labor: 1.0

The cost to diagnose the B12E0 MERCURY code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are B12E0 MERCURY code possible symptoms?

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

|What is B12E0 MERCURY code meaning?

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.

|Need more information with the B12E0 MERCURY code?

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|Need help with a B12E0 MERCURY code?

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