Output Speed Sensor Circuit No Signal
What does P0722 mean?
The P0722 code means the vehicle's onboard diagnostic system has detected: Output Speed Sensor Circuit No Signal. This is a critical severity code.
Common Symptoms
- Check Engine Light illuminated
- Speedometer reads zero while driving
- Transmission stuck in one gear
- Limp mode activated
Probable Causes (Ranked by Likelihood)
- Failed output speed sensor Very High
- Broken output speed sensor wiring High
- Damaged reluctor ring on output shaft Moderate
- TCM output speed input circuit failure Low
Step-by-Step Diagnostic Procedure
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Verify output speed sensor reads 0 MPH on scan tool while driving
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Inspect the sensor connector for disconnection
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Measure sensor AC voltage output while the vehicle moves -- no voltage confirms no signal
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Check wiring from sensor to TCM for continuity
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Remove sensor and inspect reluctor ring for damage or missing teeth
Frequently Asked Questions
Can I drive with code P0722?
Do not drive. Output Speed Sensor Circuit No Signal can cause unsafe or unpredictable transmission behavior.
What causes P0722?
The most common cause is a faulty sensor or wiring issue. Failed output speed sensor is the most likely cause.
Is P0722 expensive to fix?
Typical repair costs range from $100 - $350 (parts and labor). Sensor replacement is the most common fix.