AutoCodes – GMC – P155A 2015 GMC Sierra

P155A 2015 GMC Sierra Code - Cruise Control Switch State Undetermined

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: P155A 2015 GMC Sierra indicates Cruise Control Switch State Undetermined.
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 194

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 P155A 2015 GMC Sierra 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 Diagnostic Trouble Code (DTC) will be set when the ECM is unable to determine the state of the cruise control switch.

OBDII Code P155A 2015 GMC Sierra - Cruise Control Switch State Undetermined - AutoCodes.com — P155A 2015 GMC Sierra Code - Cruise Control Switch State Undetermined

What does this mean?

What are the Possible Causes of the DTC P155A 2015 GMC Sierra?

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 P155A 2015 GMC Sierra?

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 P155A 2015 GMC Sierra 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 P155A 2015 GMC Sierra code?

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Need Help with the Code?

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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 P155A 2015 GMC Sierra Code

1. What does OBDII code P155A on a 2015 GMC Sierra mean?

This code indicates that the cruise control switch state is undetermined.

2. What are the common symptoms of OBDII code P155A in a 2015 GMC Sierra?

Common symptoms include the cruise control system not working properly or being inoperative.

3. What are the possible causes of OBDII code P155A in a 2015 GMC Sierra?

Possible causes include a faulty cruise control switch, wiring issues, or a problem with the cruise control module.

4. How can I diagnose the cause of OBDII code P155A in my 2015 GMC Sierra?

To diagnose this code, you may need to inspect the cruise control switch, check the wiring for any damage, and test the cruise control module for proper functioning.

5. Can I still drive my 2015 GMC Sierra with OBDII code P155A?

While it may be safe to drive your vehicle with this code, it is recommended to have the issue diagnosed and repaired to ensure the proper functioning of the cruise control system.

6. How can I repair OBDII code P155A on my 2015 GMC Sierra?

Repairing this code may involve replacing the faulty cruise control switch, fixing any wiring issues, or addressing any problems with the cruise control module.

7. Is it possible to reset OBDII code P155A on a 2015 GMC Sierra without repairs?

Resetting the code without addressing the underlying issue may temporarily clear the code, but it is likely to reappear until the root cause is fixed.

8. Can a DIY enthusiast fix OBDII code P155A on a 2015 GMC Sierra?

Depending on your level of automotive expertise, you may be able to address this code yourself by following repair guides or seeking assistance from online forums.

9. How much does it typically cost to repair OBDII code P155A on a 2015 GMC Sierra?

The cost of repairing this code can vary depending on the root cause of the issue, the parts needed for repair, and whether you choose to do the repair yourself or seek professional help.

10. Will OBDII code P155A cause any long-term damage to my 2015 GMC Sierra?

While driving with this code may not immediately cause damage, it is advisable to address the issue promptly to prevent any potential long-term effects on the cruise control system.