p0721 output speed sensor range performance
P0721 Output Speed Sensor Range/Performance
Definition: The P0721 code indicates a problem with the output speed sensor circuit, which is not performing within its expected range. This sensor monitors the rotational speed of the transmission’s output shaft to ensure proper shifting and transmission operation.
p0721 – Output Speed Sensor Range/Performance
Severity: Moderate
Common Causes
p0721 – Output Speed Sensor Range/Performance
Common causes:
- Faulty output speed sensor
- Output speed sensor wiring or connector issues
- Low transmission fluid level or dirty transmission fluid
- Internal transmission problems
Common Misdiagnosis
OBD2 Code: P0721
Description: Output Speed Sensor Range/Performance
Common Misdiagnosis: Replacing the output speed sensor without checking for wiring issues or transmission fluid level problems.
Common Diagnostic Steps
OBD2 Code: P0721
Description: Output Speed Sensor Range/Performance
- Check for any stored codes and freeze frame data to understand the conditions under which the code was set.
- Inspect the output speed sensor and its wiring for damage, corrosion, or disconnection.
- Test the output speed sensor using a multimeter to ensure it is within manufacturer specifications.
- Examine the vehicle’s transmission fluid level and condition; low or dirty fluid can affect sensor performance.
- Verify that there are no issues with related components such as the input speed sensor or transmission control module (TCM).
- If necessary, replace the output speed sensor with a new one and clear codes to see if they return.