Current Input - Transmission Range (TR)
Indicates an issue with the transmission range sensor signal.
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 transmission range sensor tells the computer which gear the vehicle is in. If this sensor is sending the wrong information, the computer can’t manage the transmission properly, which can cause shifting issues or prevent the vehicle from starting.
What the computer is actually seeing
The computer expects a voltage signal between 0.5V (Park) and 4.5V (Drive) from the transmission range sensor. It checks the signal to ensure it matches the selected gear position.
What a healthy reading looks like
0.5V at Park, 2.5V at Neutral, 4.5V at Drive.
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 transmission fluid level; top off if low (should be within the crosshatch on the dipstick).
- 22. Inspect the wiring and connectors at the transmission range sensor for damage or corrosion; repair or replace as necessary.
- 33. Measure the voltage at the transmission range sensor with the key on, engine off. It should be between 0.5V and 4.5V. If not, the sensor is faulty.
- 44. If voltages are correct, check for proper function of the TCM. Verify wiring from the sensor to the TCM is intact.
- 55. Clear the code and test drive the vehicle. If the code returns, consider replacing the transmission range sensor.
Common causes
- Faulty transmission range sensor
- Wiring issues or poor connections
- Failed Transmission Control Module (TCM)
- Battery voltage drop affecting sensor operation
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not safe due to potential shifting issues, and it may affect drivability.
Will this code come back after clearing?
Yes, if the underlying issue is not fixed, the code will return.
Why does this code sometimes pair with other codes?
It can pair with codes indicating related transmission or sensor issues, leading to a cascading failure.
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 →