Rear Axle Control Module 1 - Internal Circuit Failure
There's a fault in the rear axle control module's internal circuitry.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The rear axle control module is not functioning properly due to an internal issue. This can cause problems with handling and stability of the vehicle.
What the computer is actually seeing
The rear axle control module detects an internal error in its circuitry, often shown as a voltage anomaly or communication failure with related modules.
What a healthy reading looks like
Normal operation should show voltages between 0.5V to 4.5V across module terminals during self-diagnostics.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors to the rear axle control module for corrosion or damage.
- 2 - If wiring is damaged or connectors are corroded, repair or replace.
- 32. Check the vehicle's battery voltage. Should be between 12.4V and 12.8V with the engine off.
- 4 - If voltage is low, charge the battery and retest.
- 53. Use a scan tool to clear the code and perform a test drive.
- 6 - If code returns, proceed to the next step.
- 74. Test the rear axle control module for power and ground connection.
- 8 - Power should be at least 9V; if not, trace back for a fault.
- 95. If all power and ground circuits test okay, replace the rear axle control module.
- 10 - If the issue persists, investigate further electrical interference.
Common causes
- Shorted internal circuit
- Faulty rear axle control module
- Poor electrical connections or corrosion at connectors
- Electrical interference from surrounding components
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended as it can affect vehicle stability and handling.
Will this code come back after I clear it?
If the underlying issue isn't fixed, the code will likely return.
What other components could be affected by this failure?
Issues with the rear axle control could affect traction control and stability systems.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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