AutoCodes – Generic – B11E9

B11E9 Code - Left Rear Door Ajar Switch Circuit Open

Quick Answer

The Body Control Module (BCM) monitors the Left Rear Door Ajar Switch. Common causes include Faulty Left Rear Door Ajar Switch, Left Rear Door Ajar Switch harness is open or shorted, Left Rear Door Ajar Switch circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B11E9 indicates Left Rear Door Ajar Switch Circuit Open.
Common causes: Common causes include Faulty Left Rear Door Ajar Switch, Left Rear Door Ajar Switch harness is open or shorted, Left Rear Door Ajar Switch circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 2,340

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Basic DIY (1 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B11E9 Description

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

OBDII Code B11E9 - Left Rear Door Ajar Switch Circuit Open - AutoCodes.com — B11E9 Code - Left Rear Door Ajar Switch Circuit Open

What does this mean?

What are the Possible Causes of the DTC B11E9?

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

How to Fix the DTC B11E9?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B11E9 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B11E9 code?

Need more information on how to fix the B11E9 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B11E9 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B11E9 Ford — Left Rear Door Ajar Switch Circuit Open
B11E9 Lincoln — Left Rear Door Ajar Switch Circuit Open
B11E9 Mercury — Left Rear Door Ajar Switch Circuit Open

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B11E9 Code

1. What are the common symptoms of OBDII code B11E9 (Left Rear Door Ajar Switch Circuit Open)?

- Common symptoms include a warning light on the dashboard indicating a door ajar, interior lights staying on when the door is closed, and potential issues with power door locks.

2. What can cause the OBDII code B11E9 to trigger?

- The code B11E9 is typically triggered by a faulty left rear door ajar switch or a break in the circuit connecting the switch to the vehicle's computer.

3. How can I diagnose the cause of OBDII code B11E9 being set?

- To diagnose the issue, you can visually inspect the left rear door ajar switch, check for any visible damage to the wiring harness, and use a multimeter to test the continuity of the circuit.

4. Can I continue driving my vehicle with the OBDII code B11E9 present?

- While you can technically drive the vehicle with this code, it is not recommended as it can lead to issues with the door latch, interior lights draining the battery, and potential safety concerns.

5. What are some repair tips for fixing OBDII code B11E9?

- Repair tips include cleaning the door ajar switch contacts, repairing any damaged wiring, replacing the faulty switch, and resetting the trouble code with an OBDII scanner after the repair.

6. Will resetting the OBDII code B11E9 make the problem go away permanently?

- Resetting the code without addressing the underlying issue will not fix the problem permanently. It is essential to diagnose and repair the root cause to prevent the code from reoccurring.

7. How much does it typically cost to repair OBDII code B11E9?

- The cost of repairing OBDII code B11E9 can vary depending on the cause of the issue, but it may range from $50 to $200 for parts and labor at a repair shop.

8. Can extreme weather conditions affect the left rear door ajar switch and trigger OBDII code B11E9?

- Yes, extreme weather conditions such as heavy rain or extreme cold can cause moisture or ice to interfere with the left rear door ajar switch, leading to the circuit being open and triggering the OBDII code B11E9.

9. Is it possible to prevent OBDII code B11E9 from occurring in the future?

- Regular maintenance, keeping the door switches clean and lubricated, and addressing any issues promptly can help prevent the recurrence of OBDII code B11E9 in the future.

10. Can a DIY enthusiast with basic automotive knowledge repair OBDII code B11E9?

- Yes, with basic automotive knowledge and the right tools, a DIY enthusiast can attempt to repair OBDII code B11E9 by following repair guides and tutorials specific to their vehicle model.