Advanced Diagnostics

DTC P0721: Range/Performance Problem in CVT Output Shaft (Driven Pulley) Speed Sensor Circuit




General Description
The CVT output shaft (driven pulley) speed sensor is attached to the outside of the transmission housing. The CVT output shaft (driven pulley) speed sensor detects the number of revolutions of the gear on the driven pulley and sends a pulsing signal to the powertrain control module (PCM). The PCM converts the pulsing signal into the driven pulley speed. If the driven pulley speed is lower than the value that is estimated based on the vehicle speed measured by the CVT speed sensor in the D, S, or L position, a malfunction of the CVT output shaft (driven pulley) speed sensor is detected and a DTC is stored.




Monitor Execution, Sequence, Duration, DTC Type, OBD Status




Enable Conditions

Malfunction Threshold
The driven pulley speed less than the vehicle speed measured by the CVT speed sensor by a factor of 0.53 for at least 15 seconds.

Driving Pattern
Start the engine, and drive the vehicle at a speed of 19 mph (30 km/h) or more for at least 30 seconds.

- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Diagnosis Details

Conditions for illuminating the MIL
When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the PCM memory.

Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.