Transmission · Powertrain · generic (SAE-defined)
P0722: Output Speed Sensor Circuit No Signal
P0722 means the transmission computer sees no signal from the output speed sensor even though other data shows the vehicle is moving.
Standard title per SAE J2012 / ISO 15031-6 · Updated 2026-11-07 · By CarWhere Research
How P0722 sets
The transmission control module (TCM) expects pulses from the output speed sensor whenever the vehicle is moving, which it can confirm using input speed or wheel speed data. If no output pulses are detected for a set period while those other signals show motion, the TCM sets P0722. Enabling conditions vary by manufacturer.
Common causes of P0722
Roughly most likely first; the actual cause depends on the vehicle and needs testing to confirm.
- Failed output speed sensor
- Unplugged connector or open wire
- Signal circuit shorted to ground
- Sensor not seated or excessive air gap
- Damaged reluctor
- TCM fault
P0722 symptoms
- Check engine light on
- Speedometer reads zero
- Transmission stuck in one gear or shifting erratically
- Cruise control inoperative
- ABS or traction control warning lights on some models
How P0722 is diagnosed
- Record freeze frame and confirm output speed reads zero while driving
- Inspect the connector and wiring, especially near the exhaust and crossmember
- Check sensor resistance or supply and ground, as applicable
- Check the signal circuit for opens and shorts to the module
- Remove the sensor to check seating, damage and debris
- Inspect the reluctor if the sensor and wiring test good
Typical fixes for P0722
- Replace the output speed sensor
- Repair open or shorted wiring
- Reconnect or replace a damaged connector
- Repair the reluctor or internal component
- Replace the TCM if confirmed faulty
Replace parts only after testing confirms the cause — a code names the circuit or condition that failed a check, not necessarily the faulty part. We don’t publish per-repair prices; for what households actually spend on upkeep, see car repair costs.
Related codes & warning lights
P0722 FAQ
What does code P0722 mean?
P0722 means the transmission computer sees no signal from the output speed sensor even though other data shows the vehicle is moving. The standard definition is "Output Speed Sensor Circuit No Signal."
Can I drive with a P0722 code?
Only to reach a repair shop. Without output speed, the transmission may shift erratically or stay in one gear, and the speedometer and cruise control may stop working.
Why does the speedometer read zero with P0722?
On many vehicles the output speed sensor supplies the speedometer signal, so when it goes silent the speedometer has nothing to display.
Can damaged wiring near the exhaust set P0722?
Yes. Heat or chafing near exhaust components can open or short the sensor circuit and cut off the signal entirely.
Keep researching
More transmission codes
Sources
- SAE J2012 — Diagnostic Trouble Code Definitions (standard code titles)
- ISO 15031-6 — Road vehicles: communication between vehicle and external equipment for emissions-related diagnostics, Part 6: Diagnostic trouble code definitions
- U.S. EPA — Vehicle Emissions Inspection and Maintenance (I/M) programs
- U.S. EPA, 40 CFR 86.1806-17 — Federal onboard diagnostics requirements for light-duty vehicles
General information written by CarWhere Research, not a diagnosis of your vehicle. Manufacturers can add their own sub-definitions and test conditions; confirm with the factory service information for your year, make and model. Before paying for a repair, check NHTSA for open recalls and your warranty booklet: federal law requires an emissions warranty on major emission-control parts such as the catalytic converter and engine computer.