Control Module Communication Error
There's an issue with data communication from a control module.
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 computer in the vehicle isn't getting the right signals from one of the other modules, like it can't 'talk' properly with them.
What the computer is actually seeing
The control module sees an interruption or delay in the expected communication data, often resulting in error messages or failures in other systems dependent on this data.
What a healthy reading looks like
Expected communication timing is under 100 milliseconds; if a response isn't received within that time, the error is triggered.
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. Check all related connectors and wiring for damage or corrosion.
- 22. Verify power and ground to the affected control module (typically around 12V DC).
- 33. Inspect for any aftermarket electronics that might be causing interference.
- 44. Use a scan tool to check communication status with other modules. If they are failing to respond, narrow down which module is at fault.
Common causes
- Faulty wiring or connectors between modules
- A failing control module
- Interference from aftermarket accessories
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to address this code sooner rather than later; it can affect other systems.
Will this code come back after clearing it?
If the underlying issue is not resolved, yes, it will likely return.
Why does this code pair with other codes?
Communication issues often impact multiple systems, leading to multiple codes.
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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