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Code B0125

Quick reference

B0125 at a glance

Plain-language meaning
This code means there's a problem with the part of the car that helps you see better at night using a special camera.
Urgency
Moderate – It's important to fix for safe nighttime driving, but not an immediate emergency.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Screwdrivers

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means there's a problem with the part of the car that helps you see better at night using a special camera.

Explanation

The B0125 code indicates an issue with the night vision control module, which is responsible for processing the images captured by the night vision camera.

Technical description

The night vision control module processes infrared images from the night vision camera to enhance visibility during nighttime driving. This code suggests a malfunction in the module's operation, which could affect its ability to provide enhanced night vision.

Symptoms

• Night vision system not working

• Warning light on the dashboard

• Reduced visibility at night

Common Causes

• Faulty night vision control module

• Wiring issues or poor connections

• Software or calibration errors

Glossary

Night Vision Control Module: A component that processes images from the night vision camera to enhance nighttime visibility.

Infrared: A type of light used by night vision systems to see in the dark.

Diagnosis steps

• Check for any other related codes

• Inspect wiring and connections to the module

• Test the night vision control module functionality

Repair procedures

• Repair or replace faulty wiring

• Reprogram or recalibrate the control module

• Replace the night vision control module if necessary

Tools required

• OBD-II scanner

• Multimeter

• Screwdrivers

Estimated repair cost

$200 - $800

Difficulty level

Moderate

Commonly affected vehicles

• Cadillac Escalade

• BMW 7 Series

• Mercedes-Benz S-Class

Preventive measures

• Regularly check and maintain electrical connections

• Update vehicle software as recommended

• Avoid exposure to extreme temperatures

Error code type

Sensor Issue

User experience recommendations

• Have your vehicle inspected by a professional if you see this code.

• Avoid driving at night until the issue is resolved.

Warranty information

Check with your vehicle manufacturer, as some components might be covered under warranty.

Historical data

This code has been more common in luxury vehicles equipped with advanced night vision systems.

Urgency level

Moderate – It's important to fix for safe nighttime driving, but not an immediate emergency.

Testing conditions

• Vehicle parked in a safe, well-lit area

• Engine off and key out of the ignition

Component location

The night vision control module is typically located behind the dashboard or in the vehicle's trunk area, depending on the model.

FAQs

Q: Can I drive my car with this code?
A: It's best to avoid driving at night until the issue is fixed, as your visibility may be reduced.

Q: Is this a common issue?
A: It's more common in vehicles with advanced night vision systems, particularly in luxury models.

Optional diagnostic gear

Tools that may help diagnose B0125

FOXWELL Multi-System Scanner diagnostic tool illustration

Pro · Four-system diagnostics

FOXWELL Multi-System Scanner

A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.

Body and airbag faults often need a scanner that can access more than generic powertrain codes.

View on Amazon
Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking power, ground, and continuity in body-system circuits.

View on Amazon
Bussmann Fuse Assortment diagnostic tool illustration

Universal · Fuse kit

Bussmann Fuse Assortment

Useful for electrical diagnosis when blown fuses or circuit faults are part of the troubleshooting process.

Useful when body electrical faults trace back to blown fuses or shared circuits.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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