Invalid Data Received From Vehicle Transmission Control Module (TCM)
There's an issue with the data the transmission control module is sending to the engine 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 engine control module (ECM) isn't getting the right information from the transmission control module (TCM), which can cause transmission problems.
What the computer is actually seeing
The ECM expects to receive valid data (like gear position or vehicle speed) from the TCM within a certain time frame (usually milliseconds). If it receives incorrect or no data, it sets this code.
What a healthy reading looks like
TCM should send gear position data in the range of 0-6 (each corresponding to a specific gear). If vehicle speed is expected, it should match the vehicle's actual speed in miles per hour as reported by the speed sensor.
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 TCM and ECM connectors for corrosion or damage. Fix any issues found.
- 22. Inspect wiring between TCM and ECM for shorts or open circuits using a multimeter. Expected resistance should be near 0 ohms (no breakages).
- 33. Verify power and ground to the TCM; check for 12V on the power pin and a good ground reference. If missing, trace the source.
- 44. Use a scan tool to read live data from both the ECM and TCM. Ensure that the gear position and vehicle speed match actual vehicle operation. If they don’t, the TCM may need replacing.
- 55. If the data is correct but the code persists, look for software updates or reprogram the TCM.
Common causes
- Faulty TCM
- Wiring issues between ECM and TCM
- Corroded or damaged connectors
- Software issues or need for reprogramming
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but you may experience shifting issues or unexpected behavior of the transmission, so monitor carefully.
Will the code come back after clearing?
If the underlying issue isn't fixed, yes, the code will likely return.
Why do I see this code along with others?
These codes typically indicate related issues, such as problems with communication between ECM and TCM.
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 →