Transmission Output Speed Sensor - Voltage Above Normal
Indicates the transmission output speed sensor voltage is higher than expected.
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What it means (plain English)
The transmission output speed sensor measures the speed of the output shaft, sending a signal back to the computer. If it sees a voltage that's too high, it's reading something wrong—like a short circuit or a sensor failure.
What the computer is actually seeing
The computer detects an output voltage from the transmission output speed sensor that exceeds 5 volts, suggesting a potential sensor error or wiring issue.
What a healthy reading looks like
Typically, the voltage range should be between 0.5V and 4.5V when the sensor is functioning correctly.
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.
- 1Verify the wiring and connectors for any signs of damage or corrosion; repair if necessary.
- 2Using a multimeter, check the voltage at the harness connector of the transmission output speed sensor while the engine is running; expect a voltage between 0.5V and 4.5V.
- 3If voltage exceeds 4.5V, disconnect the sensor and check the wiring harness for shorts to voltage; perform repairs as needed.
- 4If the wiring is good, replace the transmission output speed sensor and recheck the voltage.
Common causes
- Faulty transmission output speed sensor
- Short circuit in wiring
- Corroded or damaged connectors
- ECU malfunction or programming issue
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive if I see this code?
It's not recommended to drive long with this code because it may affect transmission shifting and overall vehicle performance.
Will this code come back after resetting?
If the underlying problem isn't fixed, the code will likely return after a short drive.
What else could cause similar issues?
Related codes for the input sensor can show similar symptoms, so check the input speed sensor too.
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