The brake switch is an important part of the brake system in any vehicle. It informs the powertrain control module (PCM) about the brake pedal’s position. Furthermore, the switch controls the brake lights that warn other drivers on the road about your vehicle suddenly slowing down or stopping.
The PCM will log a P0724 code if it receives an improbable signal from the brake switch.
What Does the P0724 Code Mean?
The diagnostic trouble code (DTC) P0724 indicates “Brake Switch “B” Circuit High.” It covers vehicles with automatic transmissions.
The brake switch determines how much the brake pedal has been depressed at any given time. Based on the readings from the switch, the PCM will adjust the performance of various parts and features.
Some of the powertrain parts and features that rely on accurate information on the brake pedal’s position include the torque converter clutch and cruise control. When the driver steps on the brake pedal, they will change their performance.
The PCM regularly evaluates the signals sent by the brake switches. If the controller detects a high electrical condition in the “B” circuit, it will set the generic powertrain code P0724.
Note: The definition of code P0724 can differ according to the vehicle manufacturer. Check the appropriate repair manual or repair database for the exact code definition.
What are the Common Causes of the P0724 Code?
- Faulty brake switch
- Incorrectly adjusted brake switch
- Shorted or open wiring
- Shorted or open connectors
- Blown fuse or burnt fusible link
- Bad PCM
- PCM programming error
What are the Common Symptoms of the P0724 Code?
- Illuminated check engine light
- Engine stalls while coming to a halt
- TCC lockup doesn’t work
- Poor fuel efficiency
- Reduced engine performance, especially at high speeds
- Transmission shift acts erratically
- No stop lamp switches on
- Cruise control inoperative
How to Diagnose the P0724 Code
The P0724 code is a generic powertrain code. Various makes and models with automatic transmissions can log this code. The root of the problem and its associated symptoms can vary from case to case. Each instance may also need a different approach to diagnosis and repair.
Not sure that you can perform diagnostic tests on your vehicle’s brake switch? It’s highly recommended to take it to a professional mechanic. Otherwise, you can go ahead and diagnose the issue yourself. To help you get started, here is a video that can give you an idea of what the process might involve:
How to Fix the P0724 Code
Don’t have the right tools and know-how to test the brake switch “B” circuit? That will make trying to fix a P0724 code much harder. In most cases, it’s best to tap professionals for the job.
Are you a DIYer with advanced technical knowledge and hands-on experience who can and prefers to test and replace their vehicle’s brake switches themselves? It’s a good idea to consult the appropriate repair manual or refer to an online repair database.
Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.
