P0722
Output Shaft Speed Sensor Circuit No Signal
Transmission
Generic OBD-II
High
What it means
P0722 means the transmission computer is getting no signal from the output shaft speed sensor. This sensor measures how fast the transmission output — and often the speedometer — is turning. Without it the transmission can shift harshly or stay in limp mode and the speedometer may read zero, but the engine still starts and runs.
High
Can I keep driving? Drivable but expect harsh shifting, limp mode, and possibly no speedometer; have it fixed soon.
Common symptoms
What you'll notice
- Check-engine light on
- Speedometer reading zero or erratically
- Harsh, improper, or no upshifts (limp mode)
- No torque-converter lockup and reduced fuel economy
Common causes
Most likely first
- Failed output shaft speed sensorLikely
- Open or shorted wiring in the sensor circuitCommon
- Loose or corroded connectorCommon
- Damaged tone/reluctor ring the sensor readsLess often
How to diagnose & fix
Work through it in order
- Scan and confirm no signal; check whether the speedometer works.
- Inspect the sensor connector and wiring for opens or corrosion.
- Check the sensor tip and tone ring for damage or debris.
- Replace the sensor if the wiring is good, then clear and road-test.
FAQ
Quick answers
Is it safe to drive with P0722?+
You can drive gently, but limp mode and a dead speedometer make it risky and hard to judge speed. Repair it soon.
Can I just clear P0722?+
With no signal present the code returns immediately; the transmission stays in limp mode until it's fixed.
Related codes
Often seen with P0722
Read & clear P0722 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX