AutoCodes – Chevrolet – B3145 2015 Chevrolet Silverado

B3145 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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 197

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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado - Passenger Door Unlock Switch Circuit - AutoCodes.com — B3145 2015 Chevrolet Silverado Code - Passenger Door Unlock Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B3145 2015 Chevrolet Silverado?

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 2015 Chevrolet Silverado?

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

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3145 2015 Chevrolet Silverado 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 B3145 2015 Chevrolet Silverado Code

1. What does the OBDII code B3145 mean on a 2015 Chevrolet Silverado?

B3145 indicates a problem with the passenger door unlock switch circuit, suggesting an issue with the electrical signal or wiring related to the switch.

2. What are common symptoms of the B3145 code on my Silverado?

Symptoms include the passenger door not unlocking with the switch, intermittent functionality, or the door lock system behaving erratically.

3. What causes the B3145 code to appear?

Common causes include a faulty passenger door unlock switch, damaged wiring or connectors, or a malfunction in the Body Control Module (BCM).

4. How can I diagnose the B3145 code?

Start by visually inspecting the switch, wiring, and connectors for damage or corrosion. Use a multimeter to test for continuity and check for voltage at the switch.

5. Can a blown fuse trigger the B3145 code?

Yes, a blown fuse in the door lock circuit can cause the code to appear by interrupting the electrical flow.

6. Is it safe to drive with the B3145 code present?

Yes, itâ€™s generally safe to drive, but the passenger door lock may not function correctly, potentially leading to security concerns.

7. How do I fix the B3145 code on a 2015 Silverado?

Repairs may include replacing the passenger door unlock switch, repairing damaged wiring or connectors, or reprogramming or replacing the BCM if necessary.

8. Can I clear the B3145 code without repairing the issue?

The code can be cleared temporarily with an OBDII scanner, but it will likely return if the underlying problem is not fixed.

9. How much does it cost to repair the B3145 code?

Repair costs vary depending on the issue, ranging from $50 for a simple switch replacement to $500 or more if the BCM needs replacement or reprogramming.

10. Do I need professional help to fix the B3145 code?

If you're experienced with electrical diagnostics, you may be able to fix it yourself. Otherwise, professional assistance is recommended to ensure proper diagnosis and repair.