AutoCodes – Chevrolet – B3145 Chevrolet

B3145 Chevrolet Code - Passenger Door Unlock Switch Circuit

Quick Answer

The Body Control Module (BCM) monitors the voltage level of the door lock and door unlock signal circuits. Common causes include Faulty Passenger Door Unlock Switch, Passenger Door Unlock Switch harness is open or shorted, Passenger Door Unlock 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: B3145 Chevrolet indicates Passenger Door Unlock Switch Circuit.
Common causes: Common causes include Faulty Passenger Door Unlock Switch, Passenger Door Unlock Switch harness is open or shorted, Passenger Door Unlock 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 1,933

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 11, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B3145 Chevrolet Description

The Body Control Module (BCM) monitors the voltage level of the door lock and door unlock signal circuits. When the driver door lock switch is in the open position, the voltage level in the signal circuit will be near 12 V. When the driver door lock switch is pressed to the lock or unlock position, the voltage level in the appropriate signal circuit will drop to 0 V and the BCM will detect the voltage drop and command the door latches to perform the requested lock or unlock command. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a short to ground in the switch circuit.

OBDII Code B3145 Chevrolet - Passenger Door Unlock Switch Circuit - AutoCodes.com — B3145 Chevrolet Code - Passenger Door Unlock Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B3145 Chevrolet?

Faulty Passenger Door Unlock Switch
Passenger Door Unlock Switch harness is open or shorted
Passenger Door Unlock Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3145 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 does this mean?

Code Tech Notes

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3145 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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Need more information on how to fix the B3145 Chevrolet code? Get Access to Factory Service Manuals

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Information for Specific Chevrolet Models

B3145 2014 Chevrolet Silverado — Passenger Door Unlock Switch Circuit
B3145 2015 Chevrolet Silverado — Passenger Door Unlock Switch Circuit
B3145 2016 Chevrolet Silverado — Passenger Door Unlock Switch Circuit
B3145 2017 Chevrolet Silverado — Passenger Door Unlock Switch Circuit
B3145 2018 Chevrolet Silverado — Passenger Door Unlock Switch Circuit

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 B3145 Chevrolet Code

1. What are the common symptoms of OBDII code B3145 in a Chevrolet related to the passenger door unlock switch circuit?

The common symptoms include the passenger door not unlocking using the switch, inoperative power door locks, and possibly a warning light on the dashboard.

2. What are the possible causes of OBDII code B3145 in a Chevrolet?

Potential causes include a faulty passenger door unlock switch, damaged wiring or connectors in the circuit, or a malfunctioning body control module.

3. How can I diagnose the issue causing OBDII code B3145 in my Chevrolet related to the passenger door unlock switch circuit?

You can start by checking the passenger door unlock switch for proper operation, inspecting the wiring and connectors for any damage, and using a diagnostic scanner to read the code and further troubleshoot the issue.

4. Can I repair OBDII code B3145 in a Chevrolet related to the passenger door unlock switch circuit myself?

Depending on your level of automotive knowledge and experience, you may be able to repair the issue yourself by replacing the faulty switch, repairing damaged wiring, or addressing any other identified problems in the circuit.

5. Is it safe to continue driving my Chevrolet with OBDII code B3145 related to the passenger door unlock switch circuit?

While the vehicle may still be operable, it is recommended to address the issue promptly to ensure the proper functioning of the passenger door unlock switch and overall electrical system.

6. How much does it typically cost to repair OBDII code B3145 in a Chevrolet related to the passenger door unlock switch circuit?

The cost of repair can vary depending on the specific cause of the issue, parts needed for replacement, and labor charges. It is advisable to consult a professional mechanic for an accurate estimate.

7. Can OBDII code B3145 in a Chevrolet related to the passenger door unlock switch circuit cause any other problems in the vehicle?

While the primary issue is related to the passenger door unlock switch circuit, unresolved electrical issues can potentially lead to further complications in the vehicle's electrical system if left unaddressed.

8. Are there any preventive measures I can take to avoid OBDII code B3145 in my Chevrolet related to the passenger door unlock switch circuit?

Regularly checking and maintaining the door lock switches, keeping an eye out for any unusual behavior, and addressing any electrical issues promptly can help prevent such codes from occurring.

9. Will clearing the OBDII code B3145 in a Chevrolet related to the passenger door unlock switch circuit resolve the underlying problem?

Simply clearing the code may temporarily remove the warning light, but it will not fix the root cause of the issue. It is important to diagnose and repair the problem to prevent it from recurring.

10. How long does it usually take to repair OBDII code B3145 in a Chevrolet related to the passenger door unlock switch circuit?

The repair time can vary depending on the complexity of the issue, availability of parts, and the skills of the mechanic. In some cases, it can be resolved within a few hours, while more intricate problems may take longer to fix.