P0720 – Output Speed Sensor Circuit Malfunction
- System
- AT (gearbox)
- Dashboard light
- Check engine light (MIL)
- Check-engine blink code
- —
- Applies to
- Generic OBD-II meaning. Not every code is used by this car.
- Description
- Output Speed Sensor Circuit Malfunction
- Detection / symptoms
- 1.Check engine light on 2.Delayed shifts 3.Speedometer not working
- Possible causes
- 1.Output shaft speed sensor 2.Electrical wiring or connections 3.Transmission fluid temperature sensor 4.Diagnostic / Repair Steps 5.- The OSS sensor operates by passing an electrical current through the sensor, as the reluctor ring or gear on the end of the transmission output… 6.If the resistance is out of range or over limit (OL), replace the sensor. Check for power going into the sensor, and at the PCM harness connector…
- What to check
- 1.Read the code with a scanner that can read the gearbox computer 2.Check the gearbox fluid level and condition with the correct procedure 3.Check the connector and wiring at the gearbox 4.Have a gearbox specialist confirm before replacing parts
- Confidence
- medium (generic OBD-II definition, not checked against the factory manual for this car)
Generic OBD-II meaning (obd-codes.com), not checked against this car's factory manual. Clear the code and test-drive to confirm it returns. Search all fault codes · Common problems · Warning lights