Transmission Output Speed Sensor Problem
Indicates a problem with the output speed sensor of the transmission.
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 output speed sensor measures how fast the transmission output shaft is spinning. If it fails or sends bad readings, the computer can't tell how fast the vehicle is moving, affecting overall performance.
What the computer is actually seeing
The computer monitors the voltage signal from the output speed sensor. Normally, it should fluctuate based on the speed of the output shaft. A constant signal or a signal outside expected ranges will trigger this fault code.
What a healthy reading looks like
Expected output speed sensor voltage is typically between 0.5V to 5.0V, depending on vehicle 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. Inspect wiring and connectors to the output speed sensor for damage or corrosion. Are they in good condition?
- 22. Check transmission fluid level. Is it within the normal range?
- 33. Measure voltage at the output speed sensor connector. Is it within the expected 0.5V to 5.0V while the vehicle is in motion?
- 44. If the sensor voltage is out of range, replace the output speed sensor. Does the code return?
- 55. If code persists after sensor replacement, inspect internal transmission components for issues.
Common causes
- Faulty output speed sensor
- Wiring harness damage or connector corrosion
- Transmission fluid low or contaminated
- Internal transmission problems
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but you may experience erratic shifting or poor performance. Get it fixed soon.
Will this code come back after I clear it?
If the underlying issue isn't fixed, it likely will return after a short drive.
Why does this code pair with others?
Multiple codes can show related issues, like sensor overlap or transmission problems that can affect the same systems.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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