C0307

Motor A/B Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Loss of power or unstable operation of the motor
Dips during acceleration
Activating emergency mode
Check Engine Light Illuminates

Causes

Open or short circuit in wiring harness
Malfunction of the motor solenoid valve (solenoid)
Corrosion or poor contact in connectors
Failure of the control module (ECU)
Mechanical motor failure (rare)

How to Fix

Check resistance and continuity of motor circuit (A/B)
Inspect the wiring harness for damage
Test the operation of the solenoid valve (solenoid)
Clean or replace oxidized connectors
If necessary, replace the motor or control module

Related codes

C0301 C0302 C0303