B3142 GMC 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 GMC 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.
Code B3142 GMC Description
What are the Possible Causes of the DTC B3142 GMC?
- 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 GMC?
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 GMC 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 B3142 GMC code?
Need more information on how to fix the B3142 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B3142 GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B3142 GMC Code
1. What are the common symptoms of OBDII code B3142 GMC (Left Front Unlock Switch Circuit Low)?
The common symptoms include issues with the left front door unlock switch not working properly, difficulty unlocking the left front door electronically, and potential issues with the central locking system.
2. What are the possible causes of OBDII code B3142 GMC?
The possible causes of this code include a faulty left front door unlock switch, damaged wiring or connectors in the unlock switch circuit, or a problem with the body control module.
3. How can I diagnose the cause of OBDII code B3142 GMC?
To diagnose the cause of this code, you can use a diagnostic scan tool to check for any additional trouble codes, inspect the left front door unlock switch and its wiring for damage, and perform a circuit test to identify any faults.
4. Can I still manually unlock the left front door if OBDII code B3142 GMC is triggered?
Yes, even if the code is triggered, you should still be able to manually unlock the left front door using the key or by operating the lock mechanism from the inside.
5. Are there any safety concerns associated with OBDII code B3142 GMC?
While this code may cause inconvenience due to potential issues with unlocking the left front door electronically, there are no significant safety concerns associated with it as long as manual unlocking methods are still functional.
6. How can I repair OBDII code B3142 GMC?
To repair this code, you may need to replace the left front door unlock switch if it is found to be faulty, repair any damaged wiring or connectors in the circuit, or reprogram the body control module if necessary.
7. Can OBDII code B3142 GMC affect other electronic components in the vehicle?
While this code specifically relates to the left front unlock switch circuit, it may indicate underlying issues with the vehicle's electrical system that could potentially impact other electronic components. It's important to address the root cause promptly.
8. Will OBDII code B3142 GMC cause the vehicle to fail an emissions test?
This particular code is unlikely to cause the vehicle to fail an emissions test, as it primarily relates to the operation of the left front door unlock switch and does not directly impact emissions control systems.
9. Is it necessary to address OBDII code B3142 GMC immediately?
While this code may not pose an immediate safety risk, it is recommended to address it in a timely manner to prevent any inconvenience related to unlocking the left front door and to ensure the proper functioning of the vehicle's electronic systems.
10. Can a DIY enthusiast fix OBDII code B3142 GMC at home?
Depending on your level of experience and access to tools, you may be able to diagnose and repair this code at home. However, if you're unsure or unfamiliar with automotive electrical systems, it's advisable to seek professional help to accurately diagnose and fix the issue.
Discuss the causes and fixes for B3142 GMC OBDII Code
Code B3142 GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
