How is fault code P0573 fixed?

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Get someone to press the pedal and watch the brake lights. If they don't behave properly, you've found your starting point. The brake switch feeds both the lights and the cruise system 2. Pull all stored codes and look for P0571, P0572 or P0574 alongside it. Clear them, do a short test drive and see if P0573 comes straight back 3. Have a proper look at the switch where it bolts to the pedal arm. Check it's seated, the plunger contacts the pedal cleanly, and nothing's cracked or shifted 4. Unplug the connector and inspect the pins for green corrosion, spread terminals or damp. Reseat it and try again 5. Put a multimeter across the switch circuit and compare voltage and resistance to the workshop figures for your car. A reading stuck high points at a short to power or a duff switch 6. Check the relevant fuse last, and look up any service bulletins for your model since some makers issue updated switches

Cruise Control/Brake Switch A Circuit High

Jump to the fix

Severity

High

Can I keep driving?

Avoid extended driving; visit a service soon.

First step

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Get someone to press the pedal and watch the brake lights. If they don't behave properly, you've found your starting point. The brake switch feeds both the lights and the cruise system 2. Pull all stored codes and look for P0571, P0572 or P0574 alongside it.

PPowertrain
0Generic code
5Speed / Idle
73Sequence number

What does it mean?

P0573 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Cruise Control/Brake Switch A Circuit High . This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

Symptoms

Likely causes

How to fix it

Codes From the Same System

All Fault Codes

Related Similar Codes

This information follows the generic OBD-II definition and does not replace a vehicle-specific diagnosis. The severity rating is rule-based; an authorised diagnostic reading is required for a definitive answer.