AutoCodes – GMC – B0931 GMC

B0931 GMC Code - Compass Module Circuit

Quick Answer

The Compass Module uses low-field magnetic sensing to sense vehicle directional and heading information. Common causes include Faulty Compass Module, Compass Module harness is open or shorted, Compass Module 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: B0931 GMC indicates Compass Module Circuit.
Common causes: Common causes include Faulty Compass Module, Compass Module harness is open or shorted, Compass Module 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 353

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 18, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0931 GMC Description

The Compass Module uses low-field magnetic sensing to sense vehicle directional and heading information. The Diagnostic Trouble Code (DTC) will be set when the Body Control Module Detected a Compass Module internal malfunction.

OBDII Code B0931 GMC - Compass Module Circuit - AutoCodes.com — B0931 GMC Code - Compass Module Circuit

What does this mean?

What are the Possible Causes of the DTC B0931 GMC?

Faulty Compass Module
Compass Module harness is open or shorted
Compass Module circuit poor electrical connection

How to Fix the DTC B0931 GMC?

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 B0931 GMC 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 B0931 GMC code?

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Need Help with the Code?

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Information for Specific GMC Models

B0931 2014 GMC Sierra — Compass Module Circuit
B0931 2015 GMC Sierra — Compass Module Circuit
B0931 2016 GMC Sierra — Compass Module Circuit
B0931 2017 GMC Sierra — Compass Module Circuit
B0931 2018 GMC Sierra — Compass Module Circuit

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 B0931 GMC Code

1. What are common symptoms of OBDII code B0931 GMC (Compass Module Circuit)?

- Common symptoms include inoperative compass display, erratic compass readings, or complete loss of compass functionality in the vehicle.

2. What are possible causes of OBDII code B0931 GMC?

- Possible causes of this code include a faulty compass module, damaged wiring or connectors in the compass circuit, or issues with the vehicle's body control module.

3. How can I diagnose the cause of OBDII code B0931 GMC?

- Diagnosis typically involves checking the compass module for power and ground signals, inspecting wiring and connectors for damage, and using a diagnostic scanner to read live data from the module.

4. Can a DIY enthusiast repair OBDII code B0931 GMC?

- Repairing this code may require intermediate automotive repair skills due to the need to trace wiring, test electrical components, and potentially replace the compass module. Professional assistance is recommended if unsure.

5. Are there any simple repair tips for addressing OBDII code B0931 GMC?

- A simple repair tip is to first check and ensure all wiring connections related to the compass module are secure and free of corrosion. Sometimes, a loose connection can cause the issue.

6. Is it safe to drive with OBDII code B0931 GMC present?

- It is generally safe to drive with this code, as it primarily affects the vehicle's compass functionality and does not pose a direct safety risk. However, it is recommended to address the issue promptly to restore full functionality.

7. How much does it typically cost to repair OBDII code B0931 GMC?

- The cost of repairing this code can vary depending on the underlying cause. Replacement compass modules can range from $50 to $200, with additional labor costs if professional assistance is required.

8. Can resetting the vehicle's computer clear OBDII code B0931 GMC?

- Resetting the vehicle's computer may temporarily clear the code, but it is likely to reappear if the underlying issue with the compass module or circuit is not addressed.

9. Are there any recalls or service bulletins related to OBDII code B0931 GMC?

- It is recommended to check with a GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or service bulletins related to this specific OBDII code.

10. How can I prevent OBDII code B0931 GMC from recurring in the future?

- To prevent the recurrence of this code, it is important to ensure regular maintenance of the vehicle's electrical system, including checking for signs of corrosion, securing wiring connections, and addressing any issues promptly.