AutoCodes – GMC – P155A 2017 GMC Sierra

P155A 2017 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 2017 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 163

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 2017 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 2017 GMC Sierra - Cruise Control Switch State Undetermined - AutoCodes.com — P155A 2017 GMC Sierra Code - Cruise Control Switch State Undetermined

What does this mean?

What are the Possible Causes of the DTC P155A 2017 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 2017 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 2017 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 2017 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 2017 GMC Sierra Code

1. What does OBDII code P155A mean for a 2017 GMC Sierra?

- OBDII code P155A on a 2017 GMC Sierra indicates a Cruise Control Switch State Undetermined error.

2. What are the common symptoms of OBDII code P155A in a 2017 GMC Sierra?

- Common symptoms of OBDII code P155A in a 2017 GMC Sierra may include inoperative cruise control or the cruise control system not functioning as expected.

3. What are the potential causes of OBDII code P155A in a 2017 GMC Sierra?

- The potential causes of OBDII code P155A in a 2017 GMC Sierra can include a faulty cruise control switch, wiring issues, or a malfunctioning cruise control module.

4. How do you diagnose OBDII code P155A in a 2017 GMC Sierra?

- Diagnosing OBDII code P155A in a 2017 GMC Sierra typically involves checking the cruise control switch, inspecting the wiring for any damage, and testing the cruise control module for proper functionality.

5. Can OBDII code P155A in a 2017 GMC Sierra be fixed at home?

- Depending on the underlying cause, fixing OBDII code P155A in a 2017 GMC Sierra may be possible at home if you have the necessary tools and expertise to diagnose and repair the issue.

6. Is it safe to continue driving with OBDII code P155A in a 2017 GMC Sierra?

- While OBDII code P155A may not directly affect the drivability of the vehicle, it is recommended to address the issue promptly to ensure the cruise control system functions correctly.

7. How much does it cost to repair OBDII code P155A in a 2017 GMC Sierra?

- The cost of repairing OBDII code P155A in a 2017 GMC Sierra can vary depending on the specific cause of the issue, parts needed for replacement, and labor charges at the repair shop.

8. Can resetting the OBDII system clear code P155A in a 2017 GMC Sierra?

- Resetting the OBDII system may temporarily clear code P155A in a 2017 GMC Sierra, but if the underlying issue is not fixed, the code is likely to reappear once the system detects the problem again.

9. Will OBDII code P155A cause my 2017 GMC Sierra to fail an emissions test?

- OBDII code P155A itself may not cause your 2017 GMC Sierra to fail an emissions test, but it is recommended to address any stored trouble codes before undergoing emissions testing to ensure proper functionality of all vehicle systems.

10. How long does it typically take to repair OBDII code P155A in a 2017 GMC Sierra?

- The time needed to repair OBDII code P155A in a 2017 GMC Sierra can vary depending on the complexity of the issue, availability of parts, and the skill of the technician performing the repair.