AutoCodes – Chevrolet – B3155 2018 Chevrolet Silverado

B3155 2018 Chevrolet Silverado Code - Passenger Door Lock 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 Lock Switch, Passenger Door Lock Switch harness is open or shorted, Passenger 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: B3155 2018 Chevrolet Silverado indicates Passenger Door Lock Switch Circuit.
Common causes: Common causes include Faulty Passenger Door Lock Switch, Passenger Door Lock Switch harness is open or shorted, Passenger 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 269

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 B3155 2018 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 B3155 2018 Chevrolet Silverado - Passenger Door Lock Switch Circuit - AutoCodes.com — B3155 2018 Chevrolet Silverado Code - Passenger Door Lock Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B3155 2018 Chevrolet Silverado?

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

How to Fix the DTC B3155 2018 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

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3155 2018 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.

Need more information about the B3155 2018 Chevrolet Silverado code?

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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 B3155 2018 Chevrolet Silverado Code

1. What does the OBDII code B3155 mean on a 2018 Chevrolet Silverado?

B3155 indicates an issue with the passenger door lock switch circuit, often related to electrical faults or communication errors.

2. What are the common symptoms of code B3155 in a 2018 Chevrolet Silverado?

Symptoms may include the passenger door lock not functioning, inconsistent lock operation, or the inability to lock/unlock the door using the switch.

3. What causes the B3155 code in a 2018 Chevrolet Silverado?

Common causes include a malfunctioning passenger door lock switch, damaged wiring, corroded connectors, or a fault in the Body Control Module (BCM).

4. How do I diagnose the B3155 code on a 2018 Chevrolet Silverado?

Start by inspecting the passenger door lock switch, wiring, and connectors for damage or corrosion. Use a scan tool to check for related codes and test the circuit for continuity.

5. Can a blown fuse cause the B3155 code in my 2018 Chevrolet Silverado?

Yes, a blown fuse in the door lock circuit can disrupt power to the passenger door lock switch and trigger the B3155 code.

6. How can I fix the B3155 code on a 2018 Chevrolet Silverado?

Repairs may include replacing a faulty door lock switch, repairing damaged wiring, cleaning corroded connectors, or reprogramming the BCM if necessary.

7. Is it safe to drive with the B3155 code on my 2018 Chevrolet Silverado?

Yes, but the passenger door lock may not function properly, which could pose a security risk.

8. How much does it cost to fix the B3155 code on a 2018 Chevrolet Silverado?

Repair costs vary, but replacing a door lock switch typically costs $50-$150 for parts plus labor. Wiring or BCM repairs could be more expensive.

9. Can I clear the B3155 code without fixing the issue?

Clearing the code without addressing the underlying problem will likely result in the code returning after a short time.

10. Will updating the BCM software fix the B3155 code on my 2018 Chevrolet Silverado?

In some cases, a BCM software update may resolve the issue if itâ€™s related to a software glitch, but hardware problems will still need to be repaired.