P077C

Output Shaft Speed Sensor Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect gear shifting
Transmission of the gearbox into emergency mode
Check engine light comes on
Reduced vehicle dynamics
Problems with cruise control

Causes

Faulty output shaft speed sensor
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Wiring harness damage
Problems with the transmission control unit

How to Fix

Check the condition of the output shaft speed sensor
Inspect the sensor circuit for damage
Check connections and contacts in connectors
Test the sensor with a multimeter
If necessary, replace the sensor or repair the wiring

Related codes

P077D P0720 P0721