Engine-Codes - Mercury - B12C2 MERCURY

B12C2 MERCURY Code - Puddle Lamp Circuit Short To Ground

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

|B12C2 MERCURY code possible causes

  • Blown High Mounted Stop Lamp Fuse
  • Faulty High Mounted Stop Lamp
  • High Mounted Stop Lamp harness is open or shorted
  • High Mounted Stop Lamp circuit poor electrical connection
  • Faulty Body Control Module (BCM)

|How is the B12C2 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.

|What is the cost to diagnose the B12C2 MERCURY code

Labor: 1.0

The cost to diagnose the B12C2 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 B12C2 MERCURY code possible symptoms?

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

|What is B12C2 MERCURY code meaning?

The cargo lamp illuminates when the courtesy lamps illuminate. The Body Control Module (BCM) uses a separate output circuit that supplies voltage to the cargo lamp. The cargo lamp shares the ground circuit with the High Mounted Stop Lamp. The puddle lamps (if equipped) share the voltage supply with the cargo lamp. This Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground from the cargo lamp output circuit.

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