Data Link Communication - Missing Message from ECM
The engine control module (ECM) is not sending a required message.
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 ECM is supposed to send specific data to the other control units, but it's not doing it, which can cause issues like poor performance or safety features not working.
What the computer is actually seeing
The ECM is expected to send periodic messages indicating normal operations, typically every 10-100 milliseconds depending on the system, but those messages are absent.
What a healthy reading looks like
Messages should be sent from the ECM at least every 50 ms; if not received, the fault triggers.
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 wiring and connectors between the ECM and affected modules for damage or corrosion. Repair if needed. Decision: Are the connections clean and secure?
- 22. Verify power and ground to the ECM. You should see approximately 12V on the power pins and a good ground. Decision: Are voltage and ground correct?
- 33. Check for software updates or reprogramming needs for the ECM. Decision: Is the software version current?
- 44. If all connections and power are good but the code persists, replace the ECM. Decision: Have you replaced the ECM and cleared the code?
Common causes
- Faulty ECM
- Bad wiring or connectors between ECM and other modules
- Software issues in the ECM
- Power supply issues to the ECM
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's advisable to fix it soon as it may affect performance and safety features.
Will this code come back after clearing?
Yes, it most likely will return if the root cause isn't fixed.
Why does this code pair with other SPNs?
All the SPNs can be part of the same communication network and issues with one module often affect the others.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →