Transmission Output Speed Sensor Circuit
Output speed sensor has a problem or is failing.
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What it means (plain English)
The transmission output speed sensor measures how fast the transmission is turning. If it's broken or sending the wrong readings, it can lead to shifting issues or poor performance.
What the computer is actually seeing
The computer expects a frequency signal that correlates with transmission speed (usually in pulses per revolution). If it fails to receive this signal or sees a voltage reading outside 0.1 to 5.0 volts, it triggers the code.
What a healthy reading looks like
Output speed sensor should produce a voltage signal between 0.1 and 5.0 volts based on speed.
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. Ensure it's within specs. If low, top-up.
- 22. Inspect the wiring and connectors to the output speed sensor. Look for damage, corrosion, or loose connections.
- 33. Use a multimeter to measure the output voltage from the speed sensor while the vehicle is in gear. It should show between 0.1 and 5.0 volts when the vehicle is moving.
- 44. If there is no signal (0 volts), replace the output speed sensor. If the sensor voltage is within range but the code persists, check the TCM settings and wires further, or consider the possibility of a faulty TCM.
Common causes
- Faulty output speed sensor
- Damaged wiring or connectors
- Transmission fluid level is low
- Corroded connections
- Faulty Transmission Control Module (TCM)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's advisable to fix it soon. The vehicle may have shifting issues that can lead to drivability concerns.
Will the code come back after I clear it?
If the underlying issue is not fixed, the code is likely to return.
Why does this code show with other codes?
These codes can often relate to issues in the transmission system; if one component fails, others may also experience problems.
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