AutoCodes – Chevrolet – P155B Chevrolet

P155B Chevrolet Code - Cruise Control Set/Coast Switch 2 Circuit

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: P155B Chevrolet indicates Cruise Control Set/Coast Switch 2 Circuit.
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 977

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 P155B Chevrolet 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 BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications.

OBDII Code P155B Chevrolet - Cruise Control Set/Coast Switch 2 Circuit - AutoCodes.com — P155B Chevrolet Code - Cruise Control Set/Coast Switch 2 Circuit

What does this mean?

What are the Possible Causes of the DTC P155B Chevrolet?

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 P155B Chevrolet?

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 P155B Chevrolet 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 P155B Chevrolet code?

Need more information on how to fix the P155B Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P155B Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P155B 2014 Chevrolet Silverado — Cruise Control Set/Coast Switch 2 Circuit
P155B 2015 Chevrolet Silverado — Cruise Control Set/Coast Switch 2 Circuit
P155B 2016 Chevrolet Silverado — Cruise Control Set/Coast Switch 2 Circuit
P155B 2017 Chevrolet Silverado — Cruise Control Set/Coast Switch 2 Circuit
P155B 2018 Chevrolet Silverado — Cruise Control Set/Coast Switch 2 Circuit

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 P155B Chevrolet Code

1. What does the OBDII code P155B mean on a Chevrolet?

P155B indicates an issue with the Cruise Control Set/Coast Switch 2 Circuit, which may involve a malfunction in the wiring, switch, or related components.

2. What are common symptoms of the P155B code on a Chevrolet?

Symptoms include the cruise control not engaging, disengaging unexpectedly, or the cruise control indicator light not functioning properly.

3. What causes the P155B code to appear?

Common causes include a faulty cruise control switch, damaged wiring or connectors, or a malfunction in the vehicle's control module.

4. Can I drive my Chevrolet with the P155B code active?

Yes, the vehicle is typically safe to drive, but cruise control functionality may be impaired or unavailable.

5. How can I diagnose the P155B code on my Chevrolet?

Diagnose by inspecting the cruise control switch for damage, checking the wiring and connectors for continuity, and using a scan tool to monitor switch input signals.

6. What are the most common fixes for the P155B code?

Repairs often involve replacing the cruise control switch, repairing damaged wiring, or, in rare cases, reprogramming or replacing the control module.

7. Is the P155B code specific to Chevrolet vehicles?

While it is common on Chevrolet models, other manufacturers may have similar codes for cruise control circuit issues, but the numbering and specifics may differ.

8. How much does it typically cost to fix the P155B code on a Chevrolet?

Repair costs can range from $100 to $300 depending on whether the issue is with the switch, wiring, or other components.

9. Can a bad brake light switch cause the P155B code on a Chevrolet?

Itâ€™s unlikely, but a malfunctioning brake light switch can interfere with cruise control operation and should be checked if other components seem fine.

10. Do I need to reset the code after fixing the P155B issue?

Yes, after completing repairs, clear the code with an OBDII scanner and test drive to ensure the issue is resolved.