AutoCodes – Ford – B11E9 Ford

B11E9 Ford 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 Ford 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 3,176

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

What does this mean?

What are the Possible Causes of the DTC B11E9 Ford?

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 Ford?

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 Ford 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.

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Need Help with the Code?

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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 Ford Code

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

The common symptoms include the interior lights staying on while driving, the door ajar warning light staying illuminated, and potential issues with power locks and windows on the affected door.

2. What causes the OBDII code B11E9 Ford to appear?

The code typically appears due to a faulty left rear door ajar switch or a wiring issue in the circuit that connects the switch to the vehicle's computer system.

3. How can I diagnose the cause of the B11E9 Ford code?

You can diagnose the issue by visually inspecting the left rear door ajar switch and its wiring for any visible damage or corrosion. Using a multimeter to test the switch for continuity and checking for proper voltage in the circuit can also help pinpoint the problem.

4. Can I repair the Left Rear Door Ajar Switch Circuit Open issue myself?

Yes, if you have some experience with automotive electrical systems, you can attempt to repair the problem yourself by replacing the faulty switch or repairing any damaged wiring in the circuit.

5. Is it safe to continue driving with the B11E9 Ford code active?

While it may be safe to drive with this code, it is recommended to address the issue promptly to avoid any potential electrical problems or draining the vehicle's battery due to lights staying on unnecessarily.

6. How much does it typically cost to repair the Left Rear Door Ajar Switch Circuit Open problem?

The cost of repairing this issue can vary depending on whether you do the repair yourself or take your vehicle to a mechanic. The cost of a new switch and any necessary wiring repairs should be taken into consideration.

7. Will resetting the OBDII code B11E9 Ford make the issue go away?

Resetting the code may temporarily turn off the warning light, but if the underlying issue with the left rear door ajar switch or circuit is not addressed, the code is likely to reappear.

8. Can a faulty left rear door ajar switch affect other vehicle systems?

Yes, a faulty switch can potentially affect other systems connected to the door circuit, such as the power locks, windows, and interior lighting functions.

9. Are there any preventive measures to avoid the B11E9 Ford code from appearing?

Regularly checking and maintaining the door switches and wiring in your vehicle can help prevent issues like the Left Rear Door Ajar Switch Circuit Open code from occurring.

10. How long does it usually take to repair the Left Rear Door Ajar Switch Circuit Open issue?

The repair time can vary based on the extent of the damage and your experience with automotive repairs. It can take anywhere from 30 minutes to a few hours to complete the repair.