CAN Communication Error - ABS Module
There’s a communication issue between the ABS module and the vehicle's main computer.
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 ABS module isn’t talking with the main computer like it should. This can lead to issues with anti-lock braking performance.
What the computer is actually seeing
The main computer sees no signals or corrupt data coming from the ABS module, which should normally send data every 50 milliseconds.
What a healthy reading looks like
Expected data packets from ABS should arrive within the specified CAN bus timing requirements, typically 5 - 10 ms interval.
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 the battery voltage; it should be between 11.5V - 14.5V. Ensure a good power supply.
- 22. Inspect ABS module connectors for damage or corrosion; repair any issues found.
- 33. Check for damaged wiring in the ABS circuit; repair as needed.
- 44. Use a scan tool to check for other related fault codes for context; note down any other codes present.
- 55. Verify the operation of the ABS module by performing an input test with the scan tool; if unresponsive, consider replacing the module.
Common causes
- Faulty ABS module
- Damaged wiring or connectors
- Corrupt data on the CAN bus
- Faulty main computer
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It depends. While it may be drivable, the ABS system won’t work correctly, which can affect braking safety in emergencies.
Will this code come back after clearing?
It can if the underlying issue isn’t fixed; faulty modules or wiring often cause it to return.
Can this code affect other systems?
Yes, communication errors in one module can sometimes lead to issues in related systems like traction control.
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