P155B 2016 GMC Sierra Code - Cruise Control Set/Coast Switch 2 Circuit
Quick Answer
The diagnostic trouble code P155B for a 2016 GMC Sierra relates to an issue with the Cruise Control Set/Coast Switch 2 Circuit. Common causes include Faulty cruise control switch, Damaged wiring in the cruise control circuit, 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 2016 GMC Sierra indicates Cruise Control Set/Coast Switch 2 Circuit.
- Common causes
- Common causes include Faulty cruise control switch, Damaged wiring in the cruise control circuit, 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.
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Code P155B 2016 GMC Sierra Description
The diagnostic trouble code P155B for a 2016 GMC Sierra relates to an issue with the Cruise Control Set/Coast Switch 2 Circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the cruise control system's set and coast functions. The cruise control system allows the driver to set a desired speed for the vehicle to maintain automatically, which can improve fuel efficiency and reduce driver fatigue on long trips.
Common Causes of P155B 2016 GMC Sierra
- Faulty cruise control switch.
- Damaged wiring in the cruise control circuit.
- Malfunctioning cruise control module.
- Issue with the electronic control unit (ECU) programming.
- Corrosion or poor connections in the cruise control system components.
Symptoms of P155B 2016 GMC Sierra
- Inability to set a desired speed using the cruise control system.
- Cruise control system not engaging or disengaging properly.
- Difficulty adjusting the vehicle's speed using the coast function.
- Illumination of the cruise control warning light on the dashboard.
- Erratic behavior of the cruise control system, such as sudden acceleration or deceleration.
How to Fix P155B 2016 GMC Sierra
- Diagnose the specific cause of the issue by conducting a thorough inspection of the cruise control system components.
- Test the cruise control switch, wiring, module, and ECU for proper functionality.
- Replace any faulty components, such as the cruise control switch or damaged wiring.
- Reset the ECU and reprogram the cruise control system if necessary.
- Test drive the vehicle to ensure that the cruise control system is functioning correctly after repairs.
Cost to Fix P155B 2016 GMC Sierra
The cost of repairing the Cruise Control Set/Coast Switch 2 Circuit issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, the parts required for this repair, such as a new cruise control switch or wiring harness, can range from $50 to $200. The labor costs for diagnosing and repairing this issue can add an additional $100 to $300 to the total repair bill.
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Frequently Asked Questions about P155B 2016 GMC Sierra Code
1. What does the OBDII code P155B mean on a 2016 GMC Sierra?
The P155B code indicates an issue with the Cruise Control Set/Coast Switch 2 Circuit, which is part of the cruise control system.
2. What are the common symptoms of the P155B code in a GMC Sierra?
Symptoms may include the cruise control not engaging, the cruise control shutting off unexpectedly, or the cruise control light not functioning.
3. What causes the P155B code to appear in a 2016 GMC Sierra?
Potential causes include a faulty Set/Coast switch, damaged wiring or connectors in the circuit, or a malfunctioning cruise control module.
4. Can I still drive my GMC Sierra with the P155B code?
Yes, you can drive the vehicle, but the cruise control system may not work properly, which could affect driving convenience.
5. How is the P155B code diagnosed?
A technician will use a scan tool to confirm the code, inspect the Cruise Control Set/Coast Switch 2 Circuit wiring and connectors, and test the functionality of the switch.
6. How do I fix the P155B code on my GMC Sierra?
Repairs may include replacing the Cruise Control Set/Coast switch, repairing damaged wiring or connectors, or reprogramming or replacing the cruise control module.
7. How much does it cost to repair the P155B code on a 2016 GMC Sierra?
Repair costs can vary but typically range from $100 to $300 depending on the exact issue and labor rates.
8. Can a P155B code be caused by a blown fuse?
While uncommon, a blown fuse affecting the cruise control circuit could potentially contribute to this code.
9. Can I clear the P155B code without fixing the issue?
You can clear the code with an OBDII scanner, but it will likely return if the underlying issue is not resolved.
10. Is the P155B code related to other cruise control issues?
Yes, the P155B code specifically relates to the Set/Coast switch circuit, but other cruise control problems might trigger related codes.
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