OBD Code P0721

Output Speed Sensor Circuit Range/Performance

What’s mean?

OBD2 Code P0721 Definition:
The speed sensor detects the revolution of the idler gear parking pawl lock gear and emits a pulse signal. The pulse signal is sent to the Transmission Control Module (TCM) which converts it into vehicle speed.

Symptoms

Possible sumptoms of P0721
– Engine Light ON (or Service Engine Soon Warning Light) – Speedometer improper reading – Possible shifting problems

Possible Causes

Possible causes of P0721
– Speed sensor harness or connectors – Sensor circuit is open or shorted – Speed sensor

Possible Solutions