What are the common causes of P0572?

A short to ground in the brake switch A circuit. A failed brake switch A. Corrosion in the brake switch A connector. Low battery voltage. A brake pedal position sensor fault.

Inspect the brake switch A connector and wiring. Check the circuit for a short to ground. Check battery voltage and the brake switch feed. Test the brake pedal position sensor. Replace the brake switch A if it tests low. Clear the code and retest.

P0572

Brake Switch A Circuit Low

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

What it means

P0572 means Brake Switch A Circuit Low.

Where it lives

For P0572, the circuit described runs through the switch. The description of P0572 reports a fault at the switch.

Check these first

A short to ground in the brake switch A circuit
A failed brake switch A
Corrosion in the brake switch A connector
Low battery voltage
A brake pedal position sensor fault

What to do next

Inspect the brake switch A connector and wiring
Check the circuit for a short to ground
Check battery voltage and the brake switch feed
Test the brake pedal position sensor
Replace the brake switch A if it tests low
Clear the code and retest

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Updated

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