The B131A Ford Code is a diagnostic trouble code (DTC) that indicates a malfunction in the delayed accessory power circuit. This code is set when a fault is detected in the relay control circuit and the on-board diagnostic system (OBDII) is triggered.
This article will provide an overview of the B131A Ford Code, including symptoms, causes, solutions, and cost to diagnose.
The information provided will help you understand the code and how to repair it.
Key Takeaways
- Possible causes of the B131A Ford code include a faulty accessory delay relay, open or shorted harness, poor electrical connection in the relay circuit, or a faulty Body Control Module (BCM).
- The B131A code may indicate a delayed accessory power circuit short to battery or short to ground/open.
- Steps to fix the B131A code include visually inspecting wiring harness and connectors, checking for damaged components, looking for broken or corroded connector pins, and consulting professional help if needed.
- The cost to diagnose the B131A code can vary, with an average labor cost ranging between $75 and $150 per hour.
Symptoms of the B131A Code
The B131A code can be identified by the presence of the Engine Light ON (or Service Engine Soon Warning Light), as well as activation of the Accessory Delay Relay when the ignition is turned ON, which remains active for approximately 10 minutes after ignition OFF or until a front door is opened.
OBDII sets when the Body Control Module (BCM) detects open, short to voltage, or short to ground on the relay control circuit.
Other symptoms may include electrical problems such as poor connections, damaged components, or corroded pins.
This code should be diagnosed by a professional to ensure proper repairs are done to the vehicle.
Seeking professional help is recommended to help ensure the issue is resolved and to avoid any further damages.
Diagnosing the B131A Code
Diagnosing the B131A issue requires careful visual inspection of the wiring harness and connectors, as well as a check for any damaged components or corroded connector pins. The technician should look for any broken, bent, pushed out or corroded connector pins that could be causing the issue.
It is important to check for any related factory service bulletins that could provide further insight into the issue. If unsure or unable to diagnose the issue, it is recommended to consult a professional.
Furthermore, safety recalls for the Ford vehicle should be checked to ensure all necessary repairs are completed. Taking these steps can help to diagnose and repair the B131A code issue quickly and accurately.
Common Causes of the B131A Code
Common causes of the B131A issue include:
- Faulty Accessory Delay Relay
- Open or shorted harness
- Poor electrical connection
- Faulty Body Control Module (BCM)
The Accessory Delay Relay is located in the BCM and is activated when the ignition is turned on. It remains active for approximately 10 minutes after the ignition is off, or until a front door is opened.
When the BCM detects an open, short to voltage, or short to ground on the relay control circuit, the OBDII sets a B131A Code.
Therefore, it is important to:
- Inspect the wiring harness and connectors
- Check for damaged components
- Look for bent, pushed out, or corroded pins
Service Bulletins may provide additional technical information.
If unsure or unable to fix the issue, it is best to consult a professional.
Solutions for the B131A Code
Identifying and resolving the B131A issue requires a comprehensive diagnostic approach. This approach includes visually inspecting the wiring harness and connectors, checking for damaged components, and looking for any related Factory Service Bulletins.
To inspect the wiring harness and connectors, it is important to look for broken, bent, pushed out, or corroded connector pins. These issues can often be the cause of the B131A issue.
Keeping an eye out for damaged components is also important. This can include checking for any loose or disconnected wires, as well as inspecting any related sensors or modules for signs of damage.
Finally, it is helpful to search for any related Factory Service Bulletins. These bulletins often provide additional technical information that can be used to diagnose and resolve the B131A issue.
Video Help for a Ford Body Control Module
It is imperative to gain a better understanding of the body control module when you have a B131A Ford code. It could be your exact issue. This video by the Youtube channel Top 5 Auto Repairs does a quick 3 minute video explaining the BCM along with the great information problems you may encounter to help diagnose. Give it a watch by clicking the red play button below.
Frequently Asked Questions
How Long Does It Take to Diagnose the B131A Code?
Diagnosis of the B131A code typically requires 1 hour of labor. The exact cost and time may vary depending on the location, vehicle, and engine type. It is recommended that you consult a professional if unsure about addressing the issue.
What Are the Possible Consequences of Not Fixing the B131A Code?
If the B131A code is not fixed, the engine may suffer a decrease in performance or fail to start completely. Damage to the Accessory Delay Relay or Body Control Module can cause electrical problems, resulting in expensive repairs. Ignoring the code can cause further damage and higher repair costs.
What Is the Difference Between the B131A Code and Other Ford Codes?
The B131A code is a specific code for Ford vehicles that relates to the delayed accessory power circuit being shorted. Other Ford codes may be related to other areas of the vehicle, such as the engine, transmission, or electrical components.
Are There Any Recalls Related to the B131A Code?
Yes, there may be safety recalls related to the B131A code. It is important to check for any related recalls for your Ford vehicle. Professional help may be needed if unsure or unable to fix the issue.
Is There a Way to Prevent the B131A Code From Occurring?
To prevent the B131A code from occurring, ensure all wiring harnesses and connectors are in good condition with no damage, and regularly check for any related Factory Service Bulletins. Inspect for broken, bent, pushed out, or corroded connector pins. If unsure, consult a professional.
Final Thoughts
The B131A Ford Code is a diagnostic trouble code that indicates a malfunction with the accessory delay relay. If this code is detected, the on-board diagnostic system will set the B131A code.
To fix the issue, the relay control circuit must be diagnosed and repaired. The cost to diagnose and repair the B131A code can vary depending on the extent of the damage and the parts needed.
It is important to address the issue as soon as possible to avoid further damage to the relay control circuit.
