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P155C Chevrolet Code - Cruise Control Resume/Acceleration Switch 2 Circuit

Quick Answer

The P155C code for Chevrolet vehicles specifically relates to an issue with the Cruise Control Resume/Acceleration Switch 2 Circuit. Common causes include Faulty Cruise Control Resume/Acceleration Switch: The most common cause of the P155C code is a malfunction in the cruise control switch itself, This can be due to wear and tear or electrical issues, Wiring Issues: Problems with the wiring connected to the Cruise Control Resume/Acceleration Switch can also trigger this code. 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
P155C Chevrolet indicates Cruise Control Resume/Acceleration Switch 2 Circuit.
Common causes
Common causes include Faulty Cruise Control Resume/Acceleration Switch: The most common cause of the P155C code is a malfunction in the cruise control switch itself, This can be due to wear and tear or electrical issues, Wiring Issues: Problems with the wiring connected to the Cruise Control Resume/Acceleration Switch can also trigger this code.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P155C Chevrolet Description

The P155C code for Chevrolet vehicles specifically relates to an issue with the Cruise Control Resume/Acceleration Switch 2 Circuit. This code indicates that there is a problem with the circuit responsible for the cruise control system's ability to resume or accelerate the vehicle's speed. When this code is triggered, it can affect the cruise control functionality, leading to issues with maintaining a constant speed on the highway.

OBDII Code P155C Chevrolet - Cruise Control Resume/Acceleration Switch 2 Circuit
P155C Chevrolet Code - Cruise Control Resume/Acceleration Switch 2 Circuit

Common Causes of P155C Chevrolet

  1. Faulty Cruise Control Resume/Acceleration Switch: The most common cause of the P155C code is a malfunction in the cruise control switch itself. This can be due to wear and tear or electrical issues.
  2. Wiring Issues: Problems with the wiring connected to the Cruise Control Resume/Acceleration Switch can also trigger this code. This could be due to loose connections, frayed wires, or corrosion.
  3. Faulty Cruise Control Module: A malfunction in the cruise control module, which controls the cruise control system's operation, can also lead to this code being triggered.
  4. Electronic Control Module (ECM) Failure: Issues with the vehicle's ECM, which communicates with the cruise control system, can result in the P155C code.
  5. Software Glitch: In some cases, a software glitch in the vehicle's computer system can cause errors in the cruise control system, leading to this diagnostic trouble code.

Symptoms of P155C Chevrolet

  1. Inability to Resume Speed: One of the most common symptoms associated with the P155C code is the inability to resume the set speed using the cruise control system.
  2. Inability to Accelerate: Another symptom is the cruise control system's failure to accelerate the vehicle's speed when prompted by the driver.
  3. Cruise Control Light Illuminated: The illumination of the cruise control light on the dashboard without the system functioning properly can be a sign of this issue.
  4. Erratic Cruise Control Operation: The cruise control system may exhibit erratic behavior, such as sudden speed changes or failure to maintain a constant speed.

How to Fix P155C Chevrolet

  1. Diagnose the Issue: The first step in repairing the P155C code is to diagnose the specific cause of the problem. This may involve using a diagnostic scanner to read the code and identify the underlying issue.
  2. Inspect Cruise Control Switch: Check the Cruise Control Resume/Acceleration Switch for any signs of damage or malfunction. Replace the switch if necessary.
  3. Check Wiring: Inspect the wiring connected to the cruise control switch for any damage, loose connections, or corrosion. Repair or replace any faulty wiring.
  4. Test Cruise Control Module: Test the cruise control module to ensure it is functioning correctly. Replace the module if it is found to be faulty.
  5. Clear the Code: Once the repair has been completed, clear the P155C code from the vehicle's computer system using a diagnostic scanner.

Cost to Fix P155C Chevrolet

The cost of repairing the P155C code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the cost of replacing the Cruise Control Resume/Acceleration Switch can range from $100 to $200, including parts and labor. However, additional costs may be incurred if other components, such as the cruise control module or wiring, require replacement. It's recommended to check with local auto repair shops for a more accurate estimate based on your vehicle make and model. Labor rates typically range from $80 to $150 per hour, but rates may vary based on location and shop type.

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Information for Specific Chevrolet Models

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 P155C Chevrolet Code

1. What does OBDII code P155C mean on a Chevrolet?

P155C indicates an issue with the Cruise Control Resume/Acceleration Switch 2 Circuit, which is part of the cruise control system.

2. What are the common symptoms of code P155C in a Chevrolet?

Common symptoms include the cruise control not functioning, difficulty resuming or accelerating with cruise control, and the check engine light being illuminated.

3. What causes the P155C code to appear?

The code can be triggered by a faulty cruise control switch, damaged wiring or connectors in the Resume/Acceleration Switch 2 circuit, or a malfunctioning clock spring.

4. Can I still drive my Chevrolet with the P155C code?

Yes, you can still drive the vehicle, but the cruise control system may not function properly. It’s recommended to fix the issue to restore cruise control functionality.

5. How do I diagnose the P155C code?

Start by using an OBDII scanner to confirm the code. Then inspect the cruise control switch, wiring, and connectors for damage or corrosion. Test the switch using a multimeter if necessary.

6. How can I fix the P155C code on my Chevrolet?

Repairs may include replacing the cruise control switch, repairing or replacing damaged wiring, or addressing issues with the clock spring if necessary.

7. How much does it cost to repair a P155C code issue?

The cost varies depending on the root cause. Replacing a cruise control switch typically costs $50-$200, while more extensive wiring repairs or clock spring replacement could cost more.

8. Can a faulty clock spring cause the P155C code?

Yes, a malfunctioning clock spring can interrupt the electrical connection to the cruise control switch, leading to this code.

9. Will clearing the P155C code fix the problem permanently?

Clearing the code will remove it temporarily, but unless the underlying issue is repaired, the code will likely return.

10. Is the P155C code related to other systems besides cruise control?

While primarily related to cruise control, the issue could affect other steering wheel controls if the clock spring is faulty.

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