P0724Generic code

P0724 Code: Brake Switch B Circuit High

The P0724 code means the brake switch signal used by the transmission is high, so the computer believes the brake is always pressed. The torque converter does not lock and fuel use goes up. The repair is usually cheap, an adjustment or a new switch.

Severity
Medium
Can I keep driving?
Yes, but with caution
Estimated cost
$5 to $150
Difficulty
Easy
System
Transmission
Applies to
All OBD2 vehicles

Updated Reviewed by Renzo Chacca

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What the P0724 code means

If the transmission thinks the brake is always pressed, the torque converter does not lock (more fuel use and more heat) and cruise control does not work.

The typical cause is a stuck switch or a brake pedal rubber stop that has fallen off. That is what sets the P0724 code.

A brake switch that stays closed keeps the brake lights on. Besides the code, that drains the battery when the vehicle is parked and confuses the drivers behind you. Fix it soon.

P0724 code symptoms

  • Brake lights always on.
  • High rpm on the highway.
  • Cruise control that does not work.

Likely causes of the P0724 code

  1. Stuck brake switch. It stays closed all the time.
  2. Brake pedal rubber stop that has fallen off. The switch ends up halfway through its travel.
  3. Wiring shorted to 12 volts from rubbing against another wire.

How to diagnose the P0724 code step by step

  1. Check whether the brake lights stay on.
  2. Inspect the pedal stop.

How to fix the P0724 code

  • Adjust or replace the switch, then clear the P0724 code and confirm the brake lights go off when you release the pedal.
  • Put the rubber stop back.

Technical reference data

  • 12 volt signal when the brake is pressed.
  • Reference values only: check the manufacturer data for your vehicle.

Brand-specific notes

The source describes this code as frequent on Ford and GM vehicles.

P0724 on Ford

Frequent on Ford vehicles. Check the pedal rubber stop and the switch first.

P0724 on GM

Frequent on GM vehicles. Check the pedal rubber stop and the switch first.

Frequently asked questions about P0724

What does the P0724 code mean?
It means the brake switch signal that the transmission uses is high. The computer thinks the brake is always pressed.
Can I drive with a P0724 code?
With caution. The car will run, but the brake lights stay on and the battery can run down when it is parked, so get it fixed soon.
Why does it use more fuel?
Because the torque converter does not lock up. That keeps engine speed higher on the highway and wastes fuel.
Is it expensive to fix?
No. It is usually an adjustment, a pedal stop or a low cost switch.
How much does it cost to fix P0724?
Between $5 and $150, depending on whether you need a rubber stop or a new switch with labor.

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Questions about the P0724 code

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