B3127

Left Front/Driver Door Unlock Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unlocking the left front door from a button or key fob does not work
The door does not respond to unlock commands
Intermittent door unlock operation

Causes

Broken or damaged wires in the door harness
Door unlock solenoid malfunction
Oxidation or poor contact in connectors
Problems with the door module
Body Control Module (BCM) Malfunction

How to Fix

Check the integrity of the wires in the door harness
Inspect connectors for oxidation or damage
Check the operation of the door unlock solenoid
Test door module and BCM
Replace damaged components

Related codes

B3128 B3126 B3130