Control Module Communication Circuit Range/Performance Problem
There's an issue with the communication circuit for the 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 car's computer isn't able to talk to another important part of the system, which could be caused by a bad wire or plug.
What the computer is actually seeing
Inconsistent or erroneous data being transmitted between control modules, resulting in communication fault codes.
What a healthy reading looks like
Voltage levels should be between 0.5V to 5V for data signals; resistances of connectors should be below 10 ohms.
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 wiring and connectors for damage or corrosion. Look for frayed wires or loose connectors. If found, repair or replace.
- 22. Check the resistance of the circuit. If greater than 10 ohms, repair the affected wire or connector.
- 33. Verify power supply to the control module. Power should be present as indicated by the vehicle service manual, typically around 12V.
- 44. Use a scan tool to check for any additional fault codes that might give clues to the issue at hand. Address any related fault codes first.
- 55. If no physical issues are found but the code persists, try resetting the control module. If the code returns, the module itself may be faulty.
Common causes
- Damaged wiring harness
- Loose or corroded connector
- Faulty control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It can be, but you may experience features that aren't working properly, so fix it soon.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, it will likely return.
Why do I see this code paired with other communication codes?
It's common because multiple modules share communication lines, so a fault can trigger several codes.
Working a real vehicle right now?
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