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P0722: Output Speed Sensor Circuit No Signal

Severity: Medium Avoid towing, steep loads, and prolonged driving until diagnosed. Stop and arrange recovery if the transmission slips, loses drive, overheats, or bangs into gear; driving through slip can cause further damage.

What does P0722 mean?

The controller cannot detect an output-speed signal when it expects the output shaft to be rotating. Shifting and possibly the speedometer may be affected because road-speed feedback is missing.

Generic OBD-II definition: Output Speed Sensor Circuit No Signal. Confirm applicability in your vehicle service information.

Common causes

  • Failed output-speed sensor
  • Open or shorted output-sensor harness
  • Connector or trigger-wheel damage

Symptoms

  • Speedometer may stop working
  • Harsh or missing shifts
  • Limp mode

Diagnostic focus

An absent electrical signal should be verified independently of whether the vehicle has actually lost drive. If the transmission is not moving the output shaft, a zero speed value may describe a mechanical problem.

Can I keep driving with P0722?

Severity: Medium Avoid towing, steep loads, and prolonged driving until diagnosed. Stop and arrange recovery if the transmission slips, loses drive, overheats, or bangs into gear; driving through slip can cause further damage.

If the check engine light is flashing or the car runs badly, stop driving and have it checked.

Typical fixes

  • Confirm the output should be rotating under the test conditions
  • Inspect output-sensor wiring and trigger target
  • Test the sensor signal and repair the verified failure

Related codes

P0720
Output Speed Sensor CircuitP0721
Output Speed Sensor Range/PerformanceP0502
Vehicle Speed Sensor A Circuit Low Input

Sources & review

Definitions and diagnostic background checked 2026-11-06. Generic guidance, not a substitute for the service procedure for your exact year, engine, and transmission.