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P155B 2015 Chevrolet Silverado Code - Cruise Control Set/Coast Switch 2 Circuit

Quick Answer

The diagnostic trouble code P155B for a 2015 Chevrolet Silverado refers to an issue with the Cruise Control Set/Coast Switch 2 Circuit. Common causes include Faulty cruise control switch, Wiring issues in the cruise control system, Malfunctioning cruise control module. 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 2015 Chevrolet Silverado indicates Cruise Control Set/Coast Switch 2 Circuit.
Common causes
Common causes include Faulty cruise control switch, Wiring issues in the cruise control system, Malfunctioning cruise control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P155B 2015 Chevrolet Silverado Description

The diagnostic trouble code P155B for a 2015 Chevrolet Silverado refers to an issue with the Cruise Control Set/Coast Switch 2 Circuit. This code indicates that there is a problem with the circuit that controls the cruise control set and coast functions in the vehicle. The cruise control system allows the driver to set a desired speed for the vehicle to maintain automatically, providing convenience and reducing driver fatigue on long trips.

OBDII Code P155B 2015 Chevrolet Silverado - Cruise Control Set/Coast Switch 2 Circuit
P155B 2015 Chevrolet Silverado Code - Cruise Control Set/Coast Switch 2 Circuit

Common Causes of P155B 2015 Chevrolet Silverado

  1. Faulty cruise control switch.
  2. Wiring issues in the cruise control system.
  3. Malfunctioning cruise control module.
  4. Defective cruise control sensors.
  5. Electronic control unit (ECU) communication problems.

Symptoms of P155B 2015 Chevrolet Silverado

  1. Inability to set or adjust cruise control speed.
  2. Cruise control system not engaging or disengaging properly.
  3. Illumination of the cruise control warning light on the dashboard.
  4. Erratic behavior of the cruise control system.
  5. Vehicle speed fluctuations when cruise control is activated.

How to Fix P155B 2015 Chevrolet Silverado

  1. Begin by conducting a thorough diagnostic scan to confirm the presence of the P155B code and pinpoint the exact cause of the issue.
  2. Inspect the cruise control switches and wiring for any visible damage or loose connections. Replace or repair as necessary.
  3. Test the cruise control module and sensors for proper functionality. Replace any components that are found to be faulty.
  4. Check the ECU for any communication errors related to the cruise control system. Reset or reprogram the ECU if needed.
  5. Clear the diagnostic trouble codes from the vehicle's computer and test the cruise control system to ensure proper operation.

Cost to Fix P155B 2015 Chevrolet Silverado

The typical repair costs for addressing the P155B code on a 2015 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, parts for the cruise control system such as switches, modules, and sensors can range from $50 to $200, while labor costs may add another $100 to $300 to the total repair bill. Overall, the total cost for resolving this issue could fall within the range of $150 to $500, but it's important to note that actual costs may differ based on factors such as location, shop rates, and the extent of the repairs needed. It's recommended to consult with a qualified mechanic or repair shop to obtain a more accurate estimate based on the specific circumstances of your vehicle.

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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 P155B 2015 Chevrolet Silverado Code

1. What does OBDII code P155B on a 2015 Chevrolet Silverado indicate?

This code, titled "Cruise Control Set/Coast Switch 2 Circuit," typically points to an issue with the cruise control system's set/coast switch circuit.

2. What are common symptoms of OBDII code P155B in a 2015 Chevrolet Silverado?

Common symptoms include the cruise control system not engaging, the cruise control not maintaining speed properly, or the cruise control system being inoperative altogether.

3. What are possible causes of OBDII code P155B in a 2015 Chevrolet Silverado?

Potential causes may include a faulty cruise control set/coast switch, damaged wiring or connectors in the cruise control system, or a malfunction in the cruise control module.

4. How can I diagnose OBDII code P155B on my 2015 Chevrolet Silverado?

Diagnosing this code typically involves checking the cruise control set/coast switch for proper operation, inspecting the wiring and connectors for any damage, and using a scan tool to assess the cruise control module's functionality.

5. Can I still drive my 2015 Chevrolet Silverado with OBDII code P155B present?

While the vehicle should still be safe to drive with this code, it's recommended to address the cruise control issue promptly to ensure optimal functionality and avoid any potential inconvenience.

6. How can I repair OBDII code P155B on my 2015 Chevrolet Silverado?

Repairing this code may involve replacing the cruise control set/coast switch if faulty, repairing any damaged wiring or connectors, or reprogramming the cruise control module as necessary.

7. Is it possible to reset OBDII code P155B on a 2015 Chevrolet Silverado without professional help?

While you can clear the code with an OBDII scanner, it's crucial to diagnose and address the underlying issue causing the code to prevent it from reoccurring.

8. Will OBDII code P155B on a 2015 Chevrolet Silverado affect the vehicle's performance?

This code typically won't affect the vehicle's overall performance but may impact the functionality of the cruise control system, leading to potential inconvenience for the driver.

9. How common is OBDII code P155B in 2015 Chevrolet Silverado vehicles?

While not as common as some other OBDII codes, P155B can still occur in 2015 Chevrolet Silverado models due to various factors affecting the cruise control system.

10. Can I prevent OBDII code P155B from appearing on my 2015 Chevrolet Silverado?

Regular maintenance checks on the cruise control system, prompt repair of any cruise control issues, and ensuring proper handling of the vehicle can help reduce the likelihood of encountering this particular OBDII code.

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