OBD-II Generic Error Code P0722: How to Fix It
Medium 30–60 minutes Medium Severity
Verified June 2026
- Error Code
- P0722
- Brand
- OBD-II Generic
- Product Type
- automotive
- Severity
- Medium
- DIY Difficulty
- Medium
- Estimated Fix Time
- 30–60 minutes
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Tools You'll Need
- OBD2 scanner
- Digital multimeter (DMM)
- Socket or wrench set
- Screwdrivers
- Electrical contact cleaner
- Jack and jack stands (if needed)
- Service manual (vehicle-specific)
How to Fix Error Code P0722
-
Park Safely and Turn Off Ignition
Always work in a well-ventilated area and use jack stands if lifting the vehicle. Never rely solely on a jack. -
Locate the Output Speed Sensor
-
Inspect the Sensor and Connector
Do not use excessive force on wiring or connectors. -
Check Wiring for Damage
Disconnect the battery before repairing wiring to avoid shorts. -
Test the Sensor Resistance
-
Check Sensor Signal Voltage
Be careful not to short pins when backprobing. -
Inspect the Reluctor Ring
Transmission work may require special tools; consider professional help. -
Replace the Output Speed Sensor
Ensure the O-ring is properly seated to prevent fluid leaks. -
Clear the Code and Test Drive
Check transmission fluid level and condition before driving.
Parts You May Need
Output speed sensor
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Transmission fluid (if needed)
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Reluctor ring
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Output speed sensor
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Transmission fluid (if needed)
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Reluctor ring
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Output speed sensor
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Transmission fluid (if needed)
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Reluctor ring
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Output speed sensor
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Transmission fluid (if needed)
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Reluctor ring
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When to Call a Professional
If you are uncomfortable working with transmission components, or if the code returns after replacing the sensor and checking wiring, consult a professional mechanic. Internal transmission issues (e.g., damaged reluctor ring inside the transmission) may require specialized tools and expertise.Frequently Asked Questions
What causes error code P0722?
P0722 is triggered when the PCM detects no signal from the output speed sensor. Common causes include a faulty sensor, damaged wiring or connector, a broken reluctor ring, or a malfunctioning PCM.
Can I drive with a P0722 code?
It is not recommended. The vehicle may enter limp mode, shift erratically, or stall. Driving could cause further transmission damage.
How do I test the output speed sensor?
Use a multimeter to check resistance (typically 200–1000 ohms) and voltage (signal wire should show 5V with ignition on). Also inspect the reluctor ring for damage.
Is P0722 the same as P0720?
No. P0720 indicates an output speed sensor circuit malfunction (range/performance), while P0722 means no signal at all. P0722 is often more severe.
How much does it cost to fix P0722?
If DIY, a replacement sensor costs $20–$80. Professional diagnosis and repair (including wiring or reluctor ring) can range from $150 to $500 or more.