AutoCodes – Generic – B1275

B1275 Code - Headlight Switch OFF Position Circuit Malfunction

Quick Answer

The Multiplex Integrated Control Unit (MICU) monitors the Headlight Switch Position. Common causes include Faulty Combination Headlight Switch, Combination Headlight Switch harness is open or shorted, Combination Headlight Switch circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: B1275 indicates Headlight Switch OFF Position Circuit Malfunction.
Common causes: Common causes include Faulty Combination Headlight Switch, Combination Headlight Switch harness is open or shorted, Combination Headlight Switch circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 13,127

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1275 Description

The Multiplex Integrated Control Unit (MICU) monitors the Headlight Switch Position. The MICU sets the OBDII code when the Headlight Switch Position is not to factory specifications.

OBDII Code B1275 - Headlight Switch OFF Position Circuit Malfunction - AutoCodes.com — B1275 Code - Headlight Switch OFF Position Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B1275?

Faulty Combination Headlight Switch
Combination Headlight Switch harness is open or shorted
Combination Headlight Switch circuit poor electrical connection
Faulty Multiplex Integrated Control Unit (MICU)

How to Fix the DTC B1275?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1275 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1275 code?

Need more information on how to fix the B1275 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1275 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1275 Acura — Headlight Switch OFF Position Circuit Malfunction
B1275 Honda — Headlight Switch OFF Position Circuit Malfunction

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1275 Code

What does the OBDII code B1275 indicate?

The OBDII code B1275 indicates a malfunction in the headlight switch OFF position circuit, meaning the system is detecting an issue with the switch that controls the headlights when they are turned off.

What are common symptoms of a B1275 code?

Common symptoms may include headlights that do not turn off, dashboard warning lights, or malfunctioning exterior lighting. In some cases, you may also experience issues with the vehicle's electrical system.

What could cause the B1275 code to trigger?

Possible causes include a faulty headlight switch, damaged wiring or connectors in the headlight circuit, or a malfunction in the vehicle's body control module (BCM).

How can I diagnose the B1275 code?

To diagnose the B1275 code, use an OBDII scanner to confirm the code and check for any related trouble codes. Inspect the headlight switch and wiring for damage or corrosion, and test the switch's functionality.

What repairs are typically needed for a B1275 code?

Repairs may involve replacing the faulty headlight switch, repairing damaged wiring, or addressing issues within the body control module or related electrical components.

Can I drive my vehicle with a B1275 code?

While you can drive the vehicle, it is not advisable as the headlight malfunction may reduce visibility at night or in poor weather conditions, posing a safety risk.

How much does it typically cost to fix the B1275 code?

Repair costs can vary widely depending on the specific issue, but replacing a headlight switch typically ranges from $100 to $300, including parts and labor.

Is there a way to reset the B1275 code after repairs?

Yes, the B1275 code can be reset using an OBDII scanner after the necessary repairs have been completed. However, make sure the underlying issue is resolved to prevent the code from reappearing.

What should I do if the B1275 code keeps returning?

If the B1275 code keeps returning, further diagnosis is needed to identify any underlying issues, such as faulty wiring, a problematic BCM, or an intermittent electrical problem that may not be immediately visible.