Fault in Network Communication
There’s a communication issue in the vehicle’s network.
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 vehicle’s control modules aren't talking to each other properly, which can happen when there's a broken wire or a bad connector. It’s like having a phone that can’t connect to the network.
What the computer is actually seeing
The vehicle's computer detects that one or more modules on the CAN bus are not responding or sending/receiving data correctly, usually indicated by a time-out or error in response.
What a healthy reading looks like
Expected data exchange time should be less than 5 milliseconds across the CAN network, with a stable voltage of around 2.5V to 3.5V for communication signals.
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 connectors and wiring related to the CAN bus for damage or corrosion. Repair or replace as necessary and retest.
- 22. Using a scan tool, check if other fault codes are present which might indicate a specific module failure.
- 33. Isolate the problem by disconnecting suspected faulty modules one at a time and checking if the code clears upon rechecking the network communication.
Common causes
- Damaged wiring or connectors in the CAN network
- Faulty control module
- Short circuit or open circuit in the network
- Intermittent connection issues due to corrosion or dirt
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's typically moderate severity, so you might still drive, but you could experience issues like traction control or ABS not functioning.
Will this code come back?
If the underlying issue isn’t fixed, then yes, the code will likely return after clearing it.
Why does this code appear with another code?
Communication issues often stem from a shared wiring harness or a common module, so multiple codes can indicate interrelated problems.
Working a real vehicle right now?
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