C0388

Rear Differential Lock Actuator

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–333 (est.)

Symptoms

Inability to engage differential lock
Differential lock indicator flashing
Loss of traction off-road
Unstable differential operation

Causes

Actuator jamming
Broken/frayed wiring harness
Oxidation of contacts
Control unit malfunction
Mechanical damage to the differential

How to Fix

Diagnostics of actuator and differential condition
Checking the integrity of the wiring harness
Testing contacts and power
Actuator replacement or differential repair
Reset error and check operation

Related codes

C0389 C0387 C0380