Trouble codes › P0720
P0720 Output Speed Sensor Circuit
Transmission
P0720 means the transmission isn't getting a usable output speed sensor signal, which can affect shifting and the speedometer.
The transmission computer isn't getting a usable signal from the output speed sensor, which measures how fast the transmission's output shaft (and often the vehicle) is turning.
Shifting may be erratic and the speedometer may stop working. Drive carefully and get it fixed soon.
Common causes
- A failed output speed sensor
- Damaged wiring or a corroded connector
- Metal debris on the sensor
Symptoms
- Speedometer not working or erratic
- Harsh or erratic shifts
- Limp mode, cruise control not working
What to check first
- Inspect the sensor's connector and wiring.
- Watch output speed with a scan tool while driving slowly.
- Check the sensor tip for debris.
- Replace the sensor if wiring is good.
What does P0720 mean on your vehicle?
The likely cause depends on your engine. iRepair researches your exact year, make, model and engine (service bulletins, recalls and owner reports) and tells you what to check first. Your first 3 questions are free.
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Related codes
General guidance for P0720 on most vehicles. Some makers use the same code a little differently; confirm in the service information for your vehicle, put safety first, and see a professional when in doubt.