P0722 means Output Speed Sensor Circuit No Signal. The computer is not seeing any signal from the transmission output speed sensor while the vehicle is moving. It is a generic OBD-II code, so the definition is the same on any make, but the most likely cause varies by engine; confirm with a scan tool and the service information for your vehicle before buying parts.
What P0722 means
Electronically controlled automatics are run by a transmission control module (TCM), a separate box or part of the engine computer. It reads speed sensors, the range sensor and fluid temperature to decide when to shift, and drives solenoids that apply clutches and the torque converter clutch. Many basic code readers only show the generic P0700; a scan tool that reads the transmission module shows the specific fault. Check fluid level and condition first, since low or burnt fluid causes many transmission codes.
P0722 symptoms
- Speedometer dead on many vehicles
- No upshifts or erratic shifting
- Cruise control not working
Common causes of P0722
- Failed output speed sensor
- Open wiring or a corroded connector
- Damaged tone ring
How to diagnose P0722
- Check whether the speedometer works
- Inspect the sensor and wiring
- Check sensor resistance and output
Can you drive with P0722?
With caution: shifting and the speedometer are unreliable.
P0722 tips
Because the output speed sensor often feeds the speedometer, a dead speedometer is the quickest clue. Some vehicles take the speed signal from the ABS system instead, so check for ABS codes too.
Will P0722 clear itself?
If the fault stops, the computer turns off the check engine light by itself after several drive cycles without seeing it again, and the code stays in memory as history for a while. Clearing P0722 with a scan tool after a repair is fine, but if the cause is still there the code returns, sometimes within one drive. Disconnecting the battery also clears codes on most vehicles, but it erases learned fuel trims and idle settings as well.
Related codes
| Code | Meaning |
|---|---|
| P0720 | Output Speed Sensor Circuit |
| P0717 | Input/Turbine Speed Sensor A Circuit No Signal |
| P0500 | Vehicle Speed Sensor A Malfunction |
Guides that help
When it is more than a sensor
If the fault turns out to be internal (worn clutches, a failed converter or a damaged valve body), compare a rebuild with a replacement in transmission rebuild vs replacement and transmission replacement cost, identify your unit with what transmission do I have?, and browse our transmissions.
More guides: bad transmission speed sensor symptoms.
Shipping is a flat $80.00 per order to US addresses, with 15-day free returns. Questions? Ask a parts specialist.