AutoCodes – Chevrolet – B3142 Chevrolet

B3142 Chevrolet Code - Left Front Unlock Switch Circuit Low

Quick Answer

The switch that failed and generated the Diagnostic Trouble Code (DTC) is wired to either the Driver Door Switch Assembly (DDSA) or the Passenger Front Door Module (PDM). Common causes include Faulty Left Front Power Door Lock Switch, Left Front Power Door Lock Switch harness is open or shorted, Left Front Power Door Lock 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: B3142 Chevrolet indicates Left Front Unlock Switch Circuit Low.
Common causes: Common causes include Faulty Left Front Power Door Lock Switch, Left Front Power Door Lock Switch harness is open or shorted, Left Front Power Door Lock 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 464

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 Mar 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3142 Chevrolet Description

The switch that failed and generated the Diagnostic Trouble Code (DTC) is wired to either the Driver Door Switch Assembly (DDSA) or the Passenger Front Door Module (PDM). When a door lock switch is activated to the Lock or Unlock function, the DDSA or PDM receives the switch input and sends the information on, via the Serial Data Class 2 communications line, to the Rear Integration Module (RIM), which is the master of all lock operations. If the RIM determines that the message is a valid request and conditions are correct for a door lock function to occur, it sends its OK back to all the door modules to Lock or Unlock the doors. Each door module supplies power and ground to its associated lock actuator to Lock or Unlock the associated door.

OBDII Code B3142 Chevrolet - Left Front Unlock Switch Circuit Low - AutoCodes.com — B3142 Chevrolet Code - Left Front Unlock Switch Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3142 Chevrolet?

Faulty Left Front Power Door Lock Switch
Left Front Power Door Lock Switch harness is open or shorted
Left Front Power Door Lock Switch circuit poor electrical connection
Faulty Driver Door Switch Assembly (DDSA)

How to Fix the DTC B3142 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 B3142 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.

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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 B3142 Chevrolet Code

1. What are the common symptoms of OBDII code B3142 Chevrolet (Left Front Unlock Switch Circuit Low)?

- Common symptoms include the left front door not unlocking properly, issues with the power door locks, and illuminated warning lights on the dashboard.

2. What can cause the OBDII code B3142 Chevrolet to trigger?

- The code B3142 Chevrolet can be triggered by a malfunction in the left front unlock switch circuit, faulty wiring, or a defective unlock switch.

3. How can I diagnose the cause of the OBDII code B3142 Chevrolet?

- To diagnose the issue, you can use a scan tool to check for the specific fault code, inspect the left front unlock switch and its wiring for any damage, and test the switch for proper functionality.

4. Is it safe to continue driving with the OBDII code B3142 Chevrolet present?

- It is recommended to address the issue promptly to ensure proper functioning of the left front door lock system. Driving with the code present may result in inconvenience and potential safety concerns.

5. What are some repair tips for fixing the OBDII code B3142 Chevrolet?

- Repair tips include checking and repairing any damaged wiring, replacing the left front unlock switch if necessary, and clearing the fault code using a scan tool after repairs are completed.

6. Can I reset the OBDII code B3142 Chevrolet without fixing the underlying issue?

- While you can clear the fault code temporarily, it is important to address the root cause of the problem to prevent the code from reoccurring.

7. How much does it typically cost to repair the OBDII code B3142 Chevrolet?

- The cost of repairing the code B3142 Chevrolet can vary depending on the specific cause of the issue, but it may involve replacing the left front unlock switch or repairing damaged wiring.

8. Are there any preventive measures to avoid the OBDII code B3142 Chevrolet in the future?

- Regularly inspecting the door lock system, ensuring proper maintenance of the unlock switches, and promptly addressing any issues with the power door locks can help prevent the code B3142 Chevrolet from occurring.

9. Can a DIY enthusiast fix the OBDII code B3142 Chevrolet at home?

- Depending on the level of expertise, a DIY enthusiast may be able to diagnose and repair the code B3142 Chevrolet by following repair guides, using proper tools, and taking necessary safety precautions.

10. Will the OBDII code B3142 Chevrolet affect the vehicle's overall performance?

- While the code itself may not directly impact the vehicle's performance, it can affect the convenience and security provided by the door lock system, making it important to address the issue in a timely manner.