What are the common causes of P056C?

A stuck brake pedal position sensor holding the cancel signal. A short or open in the cruise cancel circuit. Corrosion or water in the cancel circuit connector. A brake pedal switch out of adjustment. A failed cruise control module cancel output.

Read brake pedal position and cancel switch live data. Inspect the cancel circuit connector for corrosion or water. Test the cancel signal wire for opens and shorts. Check and adjust the brake pedal switch. Replace the brake pedal position sensor if it sticks. Clear the code and retest.

P056C

Cruise Control Cancel Signal

System: Speed and idle control (P code)
Lamp: Check Engine Light
Category: Powertrain - Computer and Auxiliary Controls

What it means

P056C means Cruise Control Cancel Signal.

Check these first

A stuck brake pedal position sensor holding the cancel signal
A short or open in the cruise cancel circuit
Corrosion or water in the cancel circuit connector
A brake pedal switch out of adjustment
A failed cruise control module cancel output

What to do next

Read brake pedal position and cancel switch live data
Inspect the cancel circuit connector for corrosion or water
Test the cancel signal wire for opens and shorts
Check and adjust the brake pedal switch
Replace the brake pedal position sensor if it sticks
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.