Engine-Codes - Mercury - B131B MERCURY

B131B MERCURY Code - Left Front Door Ajar Switch Circuit Open

- Code Popularity: 676 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the B131B MERCURY Code?

  • Faulty Left Front Door Ajar Switch
  • Left Front Door Ajar Switch harness is open or shorted
  • Left Front Door Ajar Switch circuit poor electrical connection
  • Faulty Body Control Module (BCM)

|How to Fix the B131B MERCURY Code?

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 B131B MERCURY code?

Labor: 1.0

The cost to diagnose the B131B 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 B131B MERCURY code possible symptoms?

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

|What Does the B131B MERCURY Code Mean?

The Body Control Module (BCM) monitors the Left Front Door Ajar Switch. The BCM sets the OBDII code when the Left Front Door Ajar Switch is not to factory specifications.

Left Front Door Ajar Switch Circuit Open

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