P155B 2015 GMC Sierra Code - Cruise Control Set/Coast Switch 2 Circuit
Quick Answer
The P155B diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to 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 2015 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 2015 GMC Sierra Description
The P155B diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Cruise Control Set/Coast Switch 2 Circuit. This code indicates that there is a malfunction in 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, which can be very convenient for long highway drives. The coast function allows the driver to reduce the set speed without disengaging the cruise control completely.
Common Causes of P155B 2015 GMC Sierra
- Faulty cruise control switch.
- Damaged wiring in the cruise control circuit.
- Malfunctioning cruise control module.
- Corrosion or poor connections in the cruise control system.
- Electronic control unit (ECU) issues.
Symptoms of P155B 2015 GMC Sierra
- Inability to set a desired speed using the cruise control system.
- Inability to use the coast function to reduce speed while cruise control is engaged.
- Cruise control system may engage intermittently or unpredictably.
- Cruise control system may not engage at all.
How to Fix P155B 2015 GMC Sierra
- Begin by conducting a thorough diagnosis of the cruise control system to identify the specific cause of the issue.
- Inspect the cruise control switch for any signs of damage or malfunction. Replace if necessary.
- Check the wiring in the cruise control circuit for any breaks, frays, or corrosion. Repair or replace as needed.
- Test the cruise control module for proper functionality. Replace if found to be faulty.
- Clear the DTC from the vehicle's computer system and test the cruise control system to ensure proper operation.
Cost to Fix P155B 2015 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 labor rates in your area. On average, the parts for this repair could range from $100 to $300, while the labor costs could be between $100 and $200. Keep in mind that these are rough estimates, and actual costs may differ based on the location, vehicle make and model, and the shop you choose to have the repair done. It is recommended to contact local auto repair shops for more accurate pricing information.
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Frequently Asked Questions about P155B 2015 GMC Sierra Code
What does the OBDII code P155B mean on a 2015 GMC Sierra?
The P155B code indicates an issue with the Cruise Control Set/Coast Switch 2 Circuit, often related to an electrical fault or malfunction in the cruise control system.
What are the common symptoms of a P155B code?
Symptoms may include the cruise control system not engaging, failing to maintain speed, or the cruise control light not functioning properly.
What causes the P155B code to appear?
Common causes include a faulty Set/Coast switch, damaged wiring, poor electrical connections, or a malfunctioning cruise control module.
Can a P155B code affect driving performance?
The code primarily impacts the cruise control system and usually does not affect overall driving performance, though it can be an inconvenience.
How can I diagnose the P155B code?
Start by inspecting the cruise control Set/Coast switch, checking the wiring and connectors for damage or corrosion, and using a multimeter to test the circuit's continuity.
Is it safe to drive with the P155B code?
Yes, it's generally safe to drive, but the cruise control functionality will be compromised until the issue is resolved.
How do I fix a P155B code on a 2015 GMC Sierra?
Repairs may involve replacing the Set/Coast switch, repairing damaged wiring, cleaning corroded connectors, or reprogramming the cruise control module if necessary.
Can a blown fuse cause the P155B code?
While rare, a blown fuse related to the cruise control system could contribute to the P155B code and should be checked during troubleshooting.
Does clearing the code fix the P155B issue?
Clearing the code may temporarily reset the system, but the underlying issue must be addressed to prevent the code from returning.
Do I need specialized tools to fix the P155B code?
Basic tools like a multimeter, a diagnostic scanner, and wiring repair tools may be needed for testing and repairs. Advanced tools may be required for module reprogramming if necessary.
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