P0720 Output Speed Sensor Circuit Malfunction
What does P0720 mean?
P0720 — Output Speed Sensor Circuit Malfunction. This is an OBD-II diagnostic trouble code a scanner retrieves when your vehicle's computer detects output speed sensor circuit malfunction. The level of risk depends on how the vehicle is currently running and how long you've been driving with the light on.
Common causes of P0720
- Faulty output speed sensor
- Damaged or shorted sensor wiring
- Low transmission fluid causing clutch slip
- Internal harness damage
- TCM fault
How to fix P0720
- Check transmission fluid level and condition
- Read output speed signal on an OBD-II scanner during a road test
- Inspect sensor wiring and connector
- Test output speed sensor resistance
- Replace the sensor or repair the internal harness as found