AutoCodes – Chevrolet – B2742 Chevrolet

B2742 Chevrolet Code - Front Fog Lamp Switch Circuit Low

Quick Answer

The fog lamp switch provides a ground input into the Body Control Module (BCM) for the fog lamp switch state input when the switch is pressed. Common causes include Faulty Front Fog Lamp Switch, Front Fog Lamp Switch harness is open or shorted, Front Fog Lamp Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B2742 Chevrolet indicates Front Fog Lamp Switch Circuit Low.
Common causes: Common causes include Faulty Front Fog Lamp Switch, Front Fog Lamp Switch harness is open or shorted, Front Fog Lamp Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 601

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2742 Chevrolet Description

The fog lamp switch provides a ground input into the Body Control Module (BCM) for the fog lamp switch state input when the switch is pressed. This input is used by the BCM to control the fog lamps. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground in the fog lamp switch signal circuit for longer than 60 seconds.

OBDII Code B2742 Chevrolet - Front Fog Lamp Switch Circuit Low - AutoCodes.com — B2742 Chevrolet Code - Front Fog Lamp Switch Circuit Low

What does this mean?

What are the Possible Causes of the DTC B2742 Chevrolet?

Faulty Front Fog Lamp Switch
Front Fog Lamp Switch harness is open or shorted
Front Fog Lamp Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2742 Chevrolet?

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 B2742 Chevrolet 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 B2742 Chevrolet code?

Need more information on how to fix the B2742 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2742 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 B2742 Chevrolet Code

1. What are the common symptoms of OBDII code B2742 in a Chevrolet related to the Front Fog Lamp Switch Circuit Low?

- The common symptoms include the front fog lamps failing to turn on, flickering or dimming lights, or the fog lamp switch not functioning properly.

2. What are the possible causes of the Front Fog Lamp Switch Circuit Low code (B2742) in a Chevrolet?

- The code B2742 can be triggered by issues such as a faulty fog lamp switch, damaged wiring or connectors in the circuit, or a malfunctioning fog lamp control module.

3. How can I diagnose the Front Fog Lamp Switch Circuit Low issue in my Chevrolet?

- To diagnose the issue, you can start by checking the fog lamp switch for proper operation, inspecting the wiring and connectors for any damage, and using a multimeter to test the circuit continuity.

4. Can a blown fuse cause the OBDII code B2742 in a Chevrolet?

- Yes, a blown fuse related to the front fog lamp circuit can also trigger the B2742 code, so it's important to check the fuse as part of the troubleshooting process.

5. Is it safe to continue driving with the Front Fog Lamp Switch Circuit Low code illuminated in my Chevrolet?

- It is generally safe to drive with this code, but you may experience reduced visibility in certain driving conditions without functioning front fog lamps.

6. How can I repair the Front Fog Lamp Switch Circuit Low issue in my Chevrolet?

- Repairing the issue involves identifying the root cause, which could range from replacing the fog lamp switch, repairing damaged wiring, to addressing any module malfunctions.

7. Can a DIY enthusiast fix the OBDII code B2742 related to the Front Fog Lamp Switch Circuit Low in a Chevrolet?

- Depending on your experience and knowledge, some DIY enthusiasts may be able to address this issue by following a repair manual or relevant online guides.

8. Will resetting the OBDII system clear the B2742 code in a Chevrolet?

- Resetting the OBDII system may clear the code temporarily, but if the underlying issue causing the Front Fog Lamp Switch Circuit Low is not fixed, the code is likely to reappear.

9. Are there any preventive measures to avoid encountering the Front Fog Lamp Switch Circuit Low code in a Chevrolet?

- Regularly inspecting the front fog lamp system, ensuring proper maintenance of components, and promptly addressing any issues can help prevent the B2742 code from appearing.

10. Should I seek professional help if I am unable to resolve the Front Fog Lamp Switch Circuit Low issue in my Chevrolet?

- If you are unable to diagnose or repair the issue yourself, it is recommended to seek assistance from a qualified mechanic or dealership to properly address the B2742 code.