AutoCodes – Cadillac – P056C Cadillac

P056C Cadillac 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 Cadillac 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 1,560

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 Cadillac 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 Cadillac - Cruise Control Cancel Switch Circuit - AutoCodes.com — P056C Cadillac Code - Cruise Control Cancel Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P056C Cadillac?

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 Cadillac?

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 Cadillac 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.

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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 Cadillac Code

1. What are the common symptoms of OBDII code P056C in a Cadillac related to the Cruise Control Cancel Switch Circuit?

- Common symptoms include inoperative cruise control, illuminated check engine light, and potentially a stored trouble code.

2. What are the possible causes of OBDII code P056C in a Cadillac?

- The code may be triggered by a faulty cruise control cancel switch, damaged wiring or connectors in the cruise control system, or a malfunctioning cruise control module.

3. How can I diagnose the Cruise Control Cancel Switch Circuit issue causing code P056C in my Cadillac?

- Diagnosis involves inspecting the cruise control cancel switch for physical damage, checking the wiring and connectors for any breaks or corrosion, and using a diagnostic scanner to retrieve trouble codes.

4. Can I still drive my Cadillac with OBDII code P056C related to the Cruise Control Cancel Switch Circuit?

- It is generally safe to drive the vehicle with this code, but it is recommended to have the issue diagnosed and repaired to restore proper cruise control functionality.

5. How can I repair OBDII code P056C in a Cadillac due to a Cruise Control Cancel Switch Circuit problem?

- Repair typically involves replacing the faulty cruise control cancel switch, repairing any damaged wiring or connectors, or reprogramming the cruise control module if necessary.

6. Will resetting the OBDII code P056C in my Cadillac clear the issue related to the Cruise Control Cancel Switch Circuit?

- Clearing the trouble code may temporarily turn off the check engine light, but the underlying problem causing the code will persist until properly diagnosed and repaired.

7. Are there any DIY tips for addressing OBDII code P056C in a Cadillac linked to the Cruise Control Cancel Switch Circuit?

- While some basic inspections like checking the switch and wiring can be done by DIY enthusiasts, diagnosing and repairing the specific cause of this code may require professional expertise.

8. How much does it typically cost to repair OBDII code P056C related to the Cruise Control Cancel Switch Circuit in a Cadillac?

- Repair costs can vary depending on the exact cause of the issue, but expenses may include parts replacement, labor fees, and diagnostic charges, ranging from $100 to $500 or more.

9. Can extreme weather conditions affect the occurrence of OBDII code P056C in a Cadillac tied to the Cruise Control Cancel Switch Circuit?

- Extreme temperatures or moisture can sometimes exacerbate issues with the cruise control cancel switch or related components, leading to the triggering of this trouble code.

10. Is the Cruise Control Cancel Switch Circuit problem causing OBDII code P056C a common issue in Cadillac vehicles?

- While not extremely common, issues with the cruise control system, including the cancel switch circuit, can occur in Cadillac vehicles and may trigger this specific OBDII code.