Output Shaft Speed Sensor Circuit No Signal
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.
Can I keep driving? Drivable but expect harsh shifting, limp mode, and possibly no speedometer; have it fixed soon.
Real-world scan data
Appears alongside · share of P0722 scans
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
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?+
Can I just clear P0722?+
Related codes
Read & clear P0722 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.