P0722: Output Shaft Speed Sensor Circuit No Signal
What to do
If the car moves normally, this is a sensor or wiring fault and the speedometer is probably dead. If the engine revs and the car does not move, the sensor is reporting accurately and the problem is inside the transmission — in that case have it recovered rather than driven.
What this code means
No output shaft speed signal at all while the vehicle is plainly moving. An open circuit, a failed sensor, or a reluctor ring that has lost teeth or spun on its shaft.
There is one case that looks like this and is not: a vehicle that genuinely is not moving because the transmission has stopped transmitting. If the engine revs and the vehicle does not go anywhere, the output shaft really is stationary and the sensor is telling the truth. The distinction is immediate from the driver's seat and completely invisible from the code, which is why the first question to ask about P0722 is whether the car still drives.
Likely causes
Start here
- Faulty output speed sensor · moderate
- Open circuit in sensor wiring · moderate
Less common
- Damaged reluctor or tone ring · specialist
- Corroded transmission connector · moderate
- Internal transmission failure · specialist
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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