AutoCodes – Generic – B251A

B251A Code - Right Rear Window Position Sensor 2 Circuit Performance

Quick Answer

The Power Top Control Module (PTCM) monitors the Right Rear Window Position Sensor 2 Circuit. Common causes include Faulty Right Rear Window Hall Sensor A, Right Rear Window Hall Sensor A harness is open or shorted, Right Rear Window Hall Sensor A 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: B251A indicates Right Rear Window Position Sensor 2 Circuit Performance.
Common causes: Common causes include Faulty Right Rear Window Hall Sensor A, Right Rear Window Hall Sensor A harness is open or shorted, Right Rear Window Hall Sensor A 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 1,238

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 B251A Description

The Power Top Control Module (PTCM) monitors the Right Rear Window Position Sensor 2 Circuit. When the Right Rear Window Hall Sensor A Signal fails to change after a window movement command, this code will set.

OBDII Code B251A - Right Rear Window Position Sensor 2 Circuit Performance - AutoCodes.com — B251A Code - Right Rear Window Position Sensor 2 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC B251A?

Faulty Right Rear Window Hall Sensor A
Right Rear Window Hall Sensor A harness is open or shorted
Right Rear Window Hall Sensor A circuit poor electrical connection
Faulty Power Top Control Module (PTCM)

How to Fix the DTC B251A?

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 B251A 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 B251A code?

Need more information on how to fix the B251A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B251A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B251A Chrysler — Right Rear Window Position Sensor 2 Circuit Performance
B251A Dodge — Right Rear Window Position Sensor 2 Circuit Performance

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 B251A Code

What does OBDII code B251A indicate?

OBDII code B251A indicates a problem with the right rear window position sensor 2 circuit performance, which means the vehicle's computer is detecting an issue with how the window position is being reported.

What are the common symptoms of code B251A?

Common symptoms include the right rear window not operating correctly, erratic window movement, or the window being stuck in one position. You may also see a warning light on the dashboard.

What could cause the B251A code to trigger?

Causes may include a faulty right rear window position sensor, wiring issues such as shorts or open circuits, or a malfunctioning body control module (BCM) that manages the window functions.

How can I diagnose the issue related to code B251A?

Start by visually inspecting the wiring and connectors related to the right rear window position sensor for damage. Then, use a multimeter to test the sensor for proper voltage and resistance. A scan tool can help monitor the sensor's data in real-time.

What repair options are available for code B251A?

Repair options include replacing the right rear window position sensor, repairing any damaged wiring or connectors, or reprogramming/replacing the body control module if it is malfunctioning.

Can I reset the B251A code without fixing the problem?

Yes, you can reset the code using an OBDII scanner, but if the underlying issue is not resolved, the code will likely return, and the symptoms will persist.

Is it safe to drive with the B251A code active?

While it may be safe to drive, the malfunctioning window could pose a safety risk, especially if it does not close properly. Itâ€™s best to address the issue as soon as possible.

How much does it cost to repair the issue related to code B251A?

Repair costs can vary widely depending on the exact cause but can range from $50 to $300 or more, depending on whether you need to replace the sensor, repair wiring, or replace the BCM.

Will clearing the code fix the problem permanently?

No, clearing the code will not fix the problem permanently. The underlying issue needs to be addressed for the code to stay cleared and for the window functionality to be restored.