Telematics Module Performance
Issue with the telematics module communication.
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 telematics module isn't talking properly with the computer, likely due to a wiring issue or a bad module.
What the computer is actually seeing
The computer sees a failure in communication from the telematics module indicating it is either malfunctioning or disconnected.
What a healthy reading looks like
Expected voltage at the module communication line is between 2.5V to 12V during active communication; failure to maintain this may trigger the code.
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 for the telematics module. Look for any damage or corrosion that could affect communication.
- 22. Check the vehicle battery voltage. Ensure it is above 12.4V; low voltage can cause modules to miscommunicate.
- 33. Use a multimeter to check the communication lines at the telematics module. Confirm the expected voltage between 2.5V to 12V during key-on, engine-off conditions.
- 44. If wiring and voltage are good, test the telematics module for normal operation using a scan tool to read live data and PID values.
- 55. If the module isn't responding or is giving incorrect data, consider replacing the telematics module.
Common causes
- Damaged wiring or connectors in the telematics system
- Failed telematics module
- Poor vehicle battery voltage affecting module operation
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but you may not have certain features like GPS or emergency assistance until it's fixed.
Will this code come back after clearing?
It can come back if the underlying issue is not resolved.
Why does this code sometimes pair with other codes?
It can indicate broader communication issues within the vehicle's network affecting multiple modules.
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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