B3410

Automatic Headlamp Leveling Control Module Front Axle Sensor Signal

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Incorrect headlight angle (lights too high or low)
Dashboard warning about lighting system malfunction
Lack of automatic adjustment of headlight levels when load changes

Causes

Faulty front axle level sensor
Open or short circuit in the sensor wiring harness
Poor contact in connectors
Software error in ALC module
Mechanical damage to the sensor arm

How to Fix

Visual inspection of the sensor and its mounting
Checking the integrity of the wiring harness and contacts
Diagnostics of sensor parameters via scanner
Replace the sensor if necessary
System calibration after repair

Related codes

B3411 B3412 U0121