Conditions for Setting the DTC

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

P0721

Output Speed Sensor = Less than 25 RPM Increase Forward & Reverse Gear

P0722

Output Speed Sensor = Greater than 30 RPM

P0723

Output Speed Sensor = Greater than 500 RPM Decrease - For 1.5 s

P077C

Output Speed Sensor = Less than 0.25 V - Signal circuit For greater than 1 s

P077D

Output Speed Sensor = Greater than 4.75 V - Signal circuit For greater than 1 s