P077D

Output Shaft Speed Sensor Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect gear shifting
Hard shifts
Transmission transition to emergency mode
Check Engine Light Illuminates
Reduced vehicle dynamics

Causes

Open or short circuit in the sensor circuit
Output shaft speed sensor malfunction
Problems with the sensor connector
Transmission control unit malfunction
Mechanical damage to the wiring harness

How to Fix

Check the integrity of the sensor circuit
Inspect the sensor connector and contacts
Check sensor resistance
Scan the control unit for other errors
If necessary, replace the output shaft speed sensor

Related codes

P077E P077F P0720