P0920

Gear Shift Forward Actuator Circuit/Open

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Inability to shift into certain gears
Incorrect gear shifting
Transmission transition to emergency mode
Check Engine Light Illuminates
Reduced vehicle dynamics

Causes

Open or short circuit in the actuator circuit
Shift actuator malfunction
Transmission control module (TCM) problems
Wiring harness damage
Poor contact in connectors

How to Fix

Check the integrity of the actuator circuit
Measure actuator resistance
Check control signals from TCM
Replace the faulty actuator if necessary
Repair damaged wiring

Related codes

P0921 P0922 P0923