Lost Communication With Vehicle Speed Control Module
There's a communication problem with the vehicle speed 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 computer in the vehicle isn’t getting any signals from the speed control module, which is supposed to send information about the speed; this can prevent cruise control from working properly.
What the computer is actually seeing
The main computer expects to receive continuous speed data signals from the vehicle speed control module at regular intervals (typically every 100 milliseconds).
What a healthy reading looks like
The speed control module should report vehicle speed within a range of 0-120 mph. If speed is constant, the data should stabilize within ±2 mph.
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 related to the vehicle speed control module for damage or corrosion.
- 22. Check for DTCs in other control modules to see if this is a widespread communication issue.
- 33. Verify power and ground supply to the vehicle speed control module (typically 5V reference voltage).
- 44. Use a scan tool to check if the speed control module is communicating (look for live data from the module).
- 55. If communication is still lost, test the vehicle speed control module by swapping or replacing it with a known good one.
Common causes
- Faulty vehicle speed control module
- Damaged wiring or connectors in the speed control circuit
- Faulty Engine Control Module (ECM)
- Software corruption in the control modules
- Poor battery voltage affecting module communication
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
Yes, it's generally safe to drive, but cruise control won't function until the issue is resolved.
Will this code clear itself?
It might clear if the issue is temporary, but usually, it requires diagnosis and repair.
Why does this code appear with other communication codes?
Often, multiple communication codes appear if there's a larger issue in the network, like a failing module or harness.
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 →