AutoCodes – Chevrolet – P155B 2018 Chevrolet Silverado

P155B 2018 Chevrolet Silverado Code - Cruise Control Set/Coast Switch 2 Circuit

Quick Answer

The Cruise Control Switch is an input to the Body Control Module (BCM). Common causes include Faulty Cruise Control Switch, Cruise Control Switch harness is open or shorted, Cruise Control 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: P155B 2018 Chevrolet Silverado indicates Cruise Control Set/Coast Switch 2 Circuit.
Common causes: Common causes include Faulty Cruise Control Switch, Cruise Control Switch harness is open or shorted, Cruise Control 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 259

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 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P155B 2018 Chevrolet Silverado Description

The Cruise Control Switch is an input to the Body Control Module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The Engine Control Module (ECM) receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications.

OBDII Code P155B 2018 Chevrolet Silverado - Cruise Control Set/Coast Switch 2 Circuit - AutoCodes.com — P155B 2018 Chevrolet Silverado Code - Cruise Control Set/Coast Switch 2 Circuit

What does this mean?

What are the Possible Causes of the DTC P155B 2018 Chevrolet Silverado?

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

How to Fix the DTC P155B 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P155B 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 P155B 2018 Chevrolet Silverado code?

Need more information on how to fix the P155B 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P155B 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 P155B 2018 Chevrolet Silverado Code

1. What does OBDII code P155B on a 2018 Chevrolet Silverado indicate?

This code specifically points to an issue with the Cruise Control Set/Coast Switch 2 Circuit.

2. What are the common symptoms of OBDII code P155B in a 2018 Chevrolet Silverado?

Common symptoms include inoperative cruise control, illuminated warning lights on the dashboard, and potentially erratic vehicle speed control.

3. What are the possible causes of OBDII code P155B in a 2018 Chevrolet Silverado?

Causes may include a faulty cruise control switch, damaged wiring or connectors in the cruise control system, or a malfunctioning cruise control module.

4. How can I diagnose the issue related to OBDII code P155B in my 2018 Chevrolet Silverado?

Diagnosis typically involves inspecting the cruise control components, checking for loose connections, testing the cruise control switch functionality, and using a diagnostic scanner to read the code and gather data.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P155B?

It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure proper cruise control functionality.

6. How can I repair OBDII code P155B on my 2018 Chevrolet Silverado?

Repair options include replacing the faulty cruise control switch, repairing damaged wiring or connectors, or recalibrating the cruise control module as needed.

7. Will resetting the OBDII code P155B in my 2018 Chevrolet Silverado make the issue go away?

Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear upon further system checks.

8. Is it possible to fix OBDII code P155B in a 2018 Chevrolet Silverado without professional help?

Depending on your automotive knowledge and skills, you may be able to address simpler causes like loose connections. However, complex issues may require professional diagnosis and repair.

9. How much does it cost to repair OBDII code P155B in a 2018 Chevrolet Silverado?

The cost can vary depending on the specific cause of the code and the required repairs. It is advisable to obtain estimates from qualified mechanics or service centers.

10. Can extreme weather conditions affect the triggering of OBDII code P155B in a 2018 Chevrolet Silverado?

While extreme weather conditions may not directly cause this code, they can potentially affect the overall performance of the cruise control system, leading to related issues.