Damaged, corroded or loose connector or wiring at the camera, particularly where it sits in the grille, bumper or behind the windscreen; Camera lens dirty, damaged, iced up or obstructed, or the housing misaligned after a minor collision; Faulty night vision camera unit; Low battery voltage or a poor earth or power supply to the camera or control module; Communication fault on the data network between the camera, night vision control module and display; Control module fault or outdated software, where a known issue exists for that model.

B0124

Night Vision Camera.

Generic
Body
Generic code
Low severity

How this code is built

B: SystemBody
0: Defined bySAE, the same on every car
1: AreaBody area 1
24: FaultThe specific fault in that area

What it means

B0124 is a body code that relates to the night vision camera, part of the driver assistance system that shows a thermal or infrared view of the road ahead. The control unit has detected a fault in the camera or its circuit, such as no signal, an implausible signal or lost communication. The exact test that failed depends on the model, so check the manufacturer's data for that vehicle.

Symptoms

Night vision display is blank, frozen or shows a fault message
Night vision function is unavailable or cannot be switched on
Warning light or message about a driver assistance or night vision fault
Picture is distorted, noisy or unusually dark or bright
Pedestrian or animal highlighting does not work, if fitted

Possible causes

Damaged, corroded or loose connector or wiring at the camera, particularly where it sits in the grille, bumper or behind the windscreenlikely
Camera lens dirty, damaged, iced up or obstructed, or the housing misaligned after a minor collisionlikely
Faulty night vision camera unitpossible
Low battery voltage or a poor earth or power supply to the camera or control modulepossible
Communication fault on the data network between the camera, night vision control module and displaypossible
Control module fault or outdated software, where a known issue exists for that modelrare

How to diagnose

Read all stored codes and freeze frame data, and note whether B0124 is current or historic and whether other network or camera codes are present
Check the camera lens and surrounding area for dirt, ice, damage or obstruction, and look for signs of impact or repair work that could have disturbed the mounting
Inspect the camera connector and wiring for water ingress, corrosion, chafing or pin damage, checking the full harness route
Check battery condition and charging voltage, as low voltage can set camera and module faults
Test the camera power supply, earth and signal or data lines against the manufacturer's wiring diagram
Check live data and the system status on the night vision display to see whether the camera is communicating
Clear the code, then recheck after a road test to see if it returns and under what conditions
Check for technical bulletins or software updates relating to the camera or control module for that model

How to fix

Clean the lens and clear any obstruction, then confirm the system works
Repair or replace damaged wiring, and clean or replace corroded connectors
Correct the camera mounting or alignment after accident damage, and carry out any calibration the manufacturer requires
Replace the faulty camera and complete any setup or calibration procedure specified for the model
Repair the battery, power supply or earth fault, or the network fault affecting communication
Update the control module software only if the manufacturer lists an outdated calibration as a known cause for this fault

Can I keep driving?

Low severity

The car can normally be driven, as night vision is an aid and does not control braking or steering. Take extra care in the dark without the system, and book it in for diagnosis soon.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.