AutoCodes – Generic – B0931

B0931 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 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 510

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
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC B0931?

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

How to Fix the DTC B0931?

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 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 code?

Need more information on how to fix the B0931 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0931 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B0931 Buick — Compass Module Circuit
B0931 Cadillac — Compass Module Circuit
B0931 Chevrolet — Compass Module Circuit
B0931 GMC — 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.