AutoCodes – Chevrolet – P056C 2015 Chevrolet Silverado

P056C 2015 Chevrolet Silverado Code - Cruise Control Cancel Switch 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: P056C 2015 Chevrolet Silverado indicates Cruise Control Cancel Switch 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 257

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 P056C 2015 Chevrolet Silverado 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. The BCM detects an invalid voltage signal on the cruise control switch signal circuit for greater than 2 seconds and sends a serial data message to the ECM. The ECM sets the Diagnostic Trouble Code (DTC) when the message is received.

OBDII Code P056C 2015 Chevrolet Silverado - Cruise Control Cancel Switch Circuit - AutoCodes.com — P056C 2015 Chevrolet Silverado Code - Cruise Control Cancel Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P056C 2015 Chevrolet Silverado?

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 P056C 2015 Chevrolet Silverado?

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 P056C 2015 Chevrolet Silverado 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 P056C 2015 Chevrolet Silverado code?

Need more information on how to fix the P056C 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P056C 2015 Chevrolet Silverado Code

1. What does the OBDII code P056C mean on a 2015 Chevrolet Silverado?

P056C indicates an issue with the Cruise Control Cancel Switch Circuit, which is responsible for deactivating cruise control when certain inputs are detected.

2. What are the symptoms of code P056C in a 2015 Chevy Silverado?

Common symptoms include the cruise control not engaging or disengaging properly, the cruise control system being inoperative, or an illuminated check engine light.

3. What causes the P056C code to appear?

This code can be triggered by a faulty cruise control cancel switch, damaged wiring or connectors, a short or open circuit in the cruise control system, or issues with the vehicle's Engine Control Module (ECM).

4. Can I still drive my 2015 Silverado with the P056C code?

Yes, you can still drive the vehicle, but the cruise control system may not function correctly, which can impact convenience and safety during long trips.

5. How do I diagnose the P056C code on my Chevy Silverado?

Start by inspecting the cruise control cancel switch and its wiring for damage or corrosion. Use a multimeter to test the switch's functionality and check for continuity in the circuit.

6. How can I fix the P056C code on my 2015 Silverado?

Repairs may include replacing the cruise control cancel switch, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.

7. How much does it cost to repair code P056C on a Chevy Silverado?

Repair costs vary depending on the exact issue. Replacing the switch typically costs between $50 and $150 for parts and labor, while wiring repairs or ECM replacement could cost more.

8. Is the P056C code covered under warranty for a 2015 Silverado?

It depends on your warranty coverage. If the vehicle is still under a powertrain or emissions warranty, the repair may be covered. Check with your dealer for details.

9. Can a bad brake light switch cause the P056C code?

Yes, since the brake light switch and cruise control cancel switch are often part of the same circuit, a malfunctioning brake light switch can potentially trigger this code.

10. Do I need special tools to fix the P056C code?

Basic tools like a multimeter and a diagnostic scanner are often sufficient for diagnosing and repairing this code. However, advanced tools may be needed for ECM programming if required.