AutoCodes – Generic – B251B

B251B Code - Left Rear Window Incorrect Direction

Quick Answer

When the Left Rear Window Motor Sensor detects that it is starting to go in the opposite direction of the command, this code will set. Common causes include Faulty Left Rear Window Hall Sensor, Left Rear Window Hall Sensor harness is open or shorted, Left Rear Window Hall Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B251B indicates Left Rear Window Incorrect Direction.
Common causes: Common causes include Faulty Left Rear Window Hall Sensor, Left Rear Window Hall Sensor harness is open or shorted, Left Rear Window Hall Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,140

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B251B Description

When the Left Rear Window Motor Sensor detects that it is starting to go in the opposite direction of the command, this code will set.

OBDII Code B251B - Left Rear Window Incorrect Direction - AutoCodes.com — B251B Code - Left Rear Window Incorrect Direction

What does this mean?

What are the Possible Causes of the DTC B251B?

Faulty Left Rear Window Hall Sensor
Left Rear Window Hall Sensor harness is open or shorted
Left Rear Window Hall Sensor circuit poor electrical connection
Faulty Window Motor

How to Fix the DTC B251B?

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 B251B 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 B251B code?

Need more information on how to fix the B251B code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B251B code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B251B Chrysler — Left Rear Window Incorrect Direction
B251B Dodge — Left Rear Window Incorrect Direction

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 B251B Code

1. What are the common symptoms associated with OBDII code B251B (Left Rear Window Incorrect Direction)?

- The common symptoms include the left rear window moving in the wrong direction or not responding to the control switch.

2. What are the possible causes of OBDII code B251B?

- The code B251B is typically triggered by a malfunction in the left rear window motor, faulty wiring, or a problem with the window control module.

3. How can I diagnose the issue related to OBDII code B251B?

- To diagnose the issue, you can perform a visual inspection of the window motor and wiring, check for any loose connections, and use a scan tool to retrieve specific error codes.

4. What are some repair tips for fixing OBDII code B251B?

- Repair tips may include checking and repairing any damaged wiring, replacing the left rear window motor if necessary, and resetting the window control module.

5. Can I fix OBDII code B251B on my own, or do I need to seek professional help?

- Depending on your level of automotive expertise, you may be able to troubleshoot and repair the issue yourself. However, seeking professional help from a certified mechanic is advisable for complex repairs.

6. Is it safe to continue driving with OBDII code B251B present?

- It is generally not recommended to drive with OBDII code B251B present, as it may lead to further damage to the window system or pose a safety risk if the window becomes stuck in the incorrect position.

7. How much does it typically cost to repair OBDII code B251B?

- The cost of repairing OBDII code B251B can vary depending on the underlying issue, but it may involve expenses for parts replacement, labor costs, and diagnostic fees.

8. Can weather conditions affect the occurrence of OBDII code B251B?

- Extreme weather conditions, such as heavy rain or extreme temperatures, can sometimes exacerbate issues related to OBDII code B251B by causing electrical components to malfunction.

9. Are there any preventive measures to avoid OBDII code B251B in the future?

- Regularly inspecting and maintaining the window system, avoiding excessive force when operating the windows, and addressing any issues promptly can help prevent OBDII code B251B from occurring.

10. Will resetting the vehicle's battery help clear OBDII code B251B?

- In some cases, resetting the vehicle's battery may temporarily clear the code, but it is important to diagnose and address the underlying issue to prevent the code from reoccurring.