P155B GMC Code - Cruise Control Set/Coast Switch 2 Circuit
Quick Answer
The P155B diagnostic trouble code (DTC) for GMC vehicles relates to the Cruise Control Set/Coast Switch 2 Circuit. Common causes include Faulty cruise control switch, Wiring issues or shorts in the cruise control circuit, Failed 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 GMC indicates Cruise Control Set/Coast Switch 2 Circuit.
- Common causes
- Common causes include Faulty cruise control switch, Wiring issues or shorts in the cruise control circuit, Failed 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 GMC Description
The P155B diagnostic trouble code (DTC) for GMC vehicles relates to the Cruise Control Set/Coast Switch 2 Circuit. This code indicates a problem with the cruise control system, specifically with the circuit related to the set/coast switch 2. The cruise control system allows the driver to set a desired speed and maintain it without using the accelerator pedal, providing convenience and comfort during long drives. When this code appears, it means that there is an issue with the circuitry responsible for controlling the cruise control function related to setting or coasting.
Common Causes of P155B GMC
- Faulty cruise control switch
- Wiring issues or shorts in the cruise control circuit
- Failed cruise control module
- Malfunctioning cruise control servo
- Issues with the brake pedal switch or clutch pedal switch
Symptoms of P155B GMC
- Inability to set cruise control speed
- Cruise control not engaging or disengaging properly
- Cruise control set speed fluctuating unexpectedly
- Illumination of the check engine light
- Possible loss of other cruise control functions
How to Fix P155B GMC
- Begin by conducting a thorough diagnostic scan to confirm the P155B code and identify the specific cause of the issue.
- Inspect the cruise control set/coast switch 2 circuit for any visible damage, loose connections, or corrosion. Repair or replace any damaged components.
- Test the cruise control switch and associated wiring for proper functionality. Replace any faulty components as needed.
- Check the cruise control module and servo for proper operation. Replace these components if they are found to be malfunctioning.
- Finally, clear the DTC and test the cruise control system to ensure that the issue has been resolved.
Cost to Fix P155B GMC
The typical repair costs for addressing the P155B code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for replacing components such as the cruise control switch, module, or servo can range from $50 to $200 or more. Labor costs for diagnosing and repairing the issue can add an additional $100 to $300 or more, depending on the shop's hourly rates and the complexity of the repair. Overall, drivers can expect to pay anywhere from $150 to $500 or more for resolving the Cruise Control Set/Coast Switch 2 Circuit issue. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the specific repair shop chosen. It's recommended to consult with a qualified mechanic or repair shop for a more accurate cost estimate.
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Information for Specific GMC Models
- P155B 2014 GMC Sierra — Cruise Control Set/Coast Switch 2 Circuit
- P155B 2015 GMC Sierra — Cruise Control Set/Coast Switch 2 Circuit
- P155B 2016 GMC Sierra — Cruise Control Set/Coast Switch 2 Circuit
- P155B 2017 GMC Sierra — Cruise Control Set/Coast Switch 2 Circuit
- P155B 2018 GMC Sierra — Cruise Control Set/Coast Switch 2 Circuit
Frequently Asked Questions about P155B GMC Code
1. What are the common symptoms of OBDII code P155B GMC?
The common symptoms of code P155B GMC include inoperative cruise control, illuminated Check Engine Light, and possible issues with the vehicle's coast switch.
2. What is the likely cause of OBDII code P155B GMC?
The most common cause of code P155B GMC is a malfunction in the cruise control set/coast switch 2 circuit, which may be due to a faulty switch or wiring issue.
3. How can I diagnose the issue related to OBDII code P155B GMC?
To diagnose code P155B GMC, start by checking the cruise control system components, such as the switches, wiring, and connections. Using a diagnostic scanner can help pinpoint the exact location of the fault.
4. Can I still drive my vehicle with OBDII code P155B GMC?
While it may be safe to drive your vehicle with code P155B GMC, it is recommended to address the issue promptly to avoid potential long-term damage to the cruise control system.
5. How can I repair OBDII code P155B GMC?
Repairing code P155B GMC involves identifying the faulty component in the cruise control set/coast switch 2 circuit and repairing or replacing it as needed. This may involve fixing wiring issues, replacing the switch, or addressing any other underlying problems.
6. Is it possible to reset OBDII code P155B GMC without repairs?
Resetting the code without addressing the underlying issue may temporarily turn off the Check Engine Light, but the problem will likely reoccur. It is best to diagnose and repair the root cause of the code to prevent further issues.
7. Can a DIY enthusiast fix OBDII code P155B GMC?
Depending on your level of automotive knowledge and experience, a DIY enthusiast may be able to diagnose and repair code P155B GMC. However, if you are unsure about the repair process, it is recommended to seek professional help to avoid further complications.
8. How do I prevent OBDII code P155B GMC from appearing again?
To prevent code P155B GMC from reoccurring, perform regular maintenance checks on your vehicle's cruise control system, including inspecting switches, connections, and wiring for any signs of wear or damage.
9. Does OBDII code P155B GMC affect the overall performance of the vehicle?
While code P155B GMC is primarily related to the cruise control system, addressing the issue promptly can help maintain the overall performance and functionality of your vehicle by ensuring all systems are in proper working condition.
10. What should I do if OBDII code P155B GMC persists after repairs?
If code P155B GMC persists after repairs, recheck the components of the cruise control system for any overlooked issues. It may also be helpful to consult with a professional mechanic for further diagnosis and assistance.
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