P0720: Output Speed Sensor Circuit Malfunction
System: Transmission · Priority: high
What P0720 means
The control module detected a condition matching the generic definition Output Speed Sensor Circuit Malfunction. A trouble code identifies what the module detected; it does not automatically identify the failed part.
Useful next checks
- Inspect output-speed sensor wiring and connector.
- Compare output-speed data with vehicle speed.
- Scan ABS and transmission modules because some vehicles share speed information over the network.
Why vehicle context matters
The same generic code can have different diagnostic paths depending on engine, calibration, wiring layout, service bulletins and related codes. Freeze-frame and live data can help establish when the fault occurred.
Need a scanner for P0720?
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