Output Speed Sensor Circuit No Signal
The output speed sensor isn't sending a signal to the computer.
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 vehicle's transmission is turning. If it's not sending any signal, the computer doesn't know when to shift gears, which can cause performance issues.
What the computer is actually seeing
The transmission control module (TCM) expects to see a voltage signal from the output speed sensor. When the car is moving, this signal should vary between 0.5 to 1.5 volts, representing different speeds. If there's no signal, it defaults to a failure mode, impacting shifting.
What a healthy reading looks like
Voltage signal from the output speed sensor should be between 0.5 to 1.5 volts while the vehicle is in motion, with frequency increasing as speed increases.
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. Add fluid if it's low, and inspect for leaks. Decision: Is fluid level okay? If no, add fluid and recheck code after repairs. If yes, move to step 2.
- 22. Inspect the wiring going to the output speed sensor for damage or corrosion. Use a multimeter to check continuity. Decision: Is wiring intact? If no, repair or replace as needed. If yes, move to step 3.
- 33. Check the output speed sensor itself with a multimeter. It should have a resistance of around 500-2000 ohms. Decision: Is the sensor functioning? If no, replace the sensor. If yes, move to step 4.
- 44. Verify the sensor's signal at the TCM using a scan tool. While the vehicle is moving, you should see the signal change between 0.5 to 1.5 volts. Decision: Is there a signal? If no, replace the sensor. If yes, consider a TCM issue or recheck previous steps.
Common causes
- Faulty output speed sensor
- Wiring issues (damaged or shorted wires)
- Connector problems (corroded or loose connections)
- Transmission fluid level low or contaminated
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive my vehicle with this code?
Yes, but drivability may be impacted as the transmission might not shift correctly.
Will this code come back after I clear it?
It can return if the underlying issue isn't fixed, especially if wiring or sensor problems persist.
Why might this code appear after a transmission service?
If the fluid was low or contaminated, or if the sensor wiring got disturbed during service, it could trigger this code.
Working a real vehicle right now?
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