P0724 Brake Torque Switch B Sensor Circuit High

P0724 – OBD-II Trouble Code Technical Description

The P0724 code indicates that the vehicle's computer has detected a malfunction in the Brake Torque Switch B sensor circuit, which also disables the cruise control system and the torque converter lockup system.

What does the fault code mean P0724?

Trouble code P0724 indicates a problem in the brake torque switch "B" sensor circuit. This sensor is usually responsible for disabling the cruise control system and torque converter lockup when the brake pedal is pressed. This circuit can also disable the torque converter lockup system as well as the cruise control system. When you press the brake pedal, the brake light switch activates several circuits, such as the transmission lock switch circuit. The brake light switch “B” allows you to disable the cruise control system by pressing the brake pedal, as well as the torque converter lock-up system when the vehicle is stopped.

Possible reasons

Some possible reasons for the P0724 trouble code:

• Defect or damage to torque switch sensor “B” when braking.
• Problems with the wiring or electrical connections in the sensor circuit.
• There is a malfunction in the engine control module (ECM) or transmission control module (TCM).
• Failure in the cruise control system or torque converter lockup.
• Mechanical damage or wear of parts affecting the operation of the sensor or its signal.

What are the symptoms of a fault code? P0724?

Some possible symptoms for trouble code P0724:

• Unusual transmission behavior such as jerking or hesitation when shifting gears.
• The cruise control system is not functioning properly, it may not activate or it may deactivate unintentionally.
• The torque converter lock-up system is malfunctioning, which can cause problems when stopping the vehicle or driving at low speeds.
• The Check Engine light turns on on the car's dashboard.

How to diagnose a fault code P0724?

The following steps are recommended to diagnose DTC P0724:

1. Check the connection and condition of brake light switch B: Check the condition of brake light switch B and its connections. Make sure it is installed correctly and is not damaged or corroded.
2. Check wiring and connections: Inspect the wiring, connections and connectors associated with the brake light switch B. Make sure the wires are not broken or damaged and are well connected.
3. Diagnostics using a car scanner: Use a car scanner to read trouble codes and sensor data. Check to see if there are other trouble codes that may help determine the cause of the problem.
4. Testing Brake Light Switch B: Test brake light switch B using a multimeter or tester. Check its operation when you press the brake pedal and make sure it responds correctly and sends a signal to the PCM.
5. Check the automatic transmission control module (PCM): If necessary, check the automatic transmission control module for defects or malfunctions that could lead to the P0724 code.
6. Check the cruise control system: If the cruise control system is suspected to be affected, check its operation and connection to the brake light switch B.
7. Professional diagnostics: In case of difficulties or lack of experience, it is better to contact a professional auto mechanic or car service center for further diagnosis and solution to the problem.

These steps will help you determine the cause and resolve the P0724 code.

Diagnostic errors

When diagnosing DTC P0724, the following errors may occur:

1. Not checking brake light switch B: Failure to check the condition and functionality of brake light switch B may result in incorrect diagnosis. Improper functioning of the switch may cause the problem to be misinterpreted.
2. Insufficient wiring check: Incorrect or incomplete testing of wiring, connections, and connectors may result in a problem being missed. It is important to carefully inspect and test all connections and wires.
3. Ignoring other fault codes: Sometimes the P0724 code can be related to other trouble codes or problems that may be overlooked. It is important to check all fault codes and take them into account when diagnosing.
4. Misinterpretation of scanner data: Misinterpretation of data obtained from a vehicle scanner may result in the problem being misdiagnosed. It is necessary to correctly interpret the data and take into account the context when analyzing it.
5. Not taking into account all possible reasons: It is important to consider all possible causes of the P0724 code, including not only brake light switch B, but also other transmission system components and electrical circuits.

How serious is the fault code? P0724?

Trouble code P0724 indicates a problem with the Brake Torque Switch “B” sensor, which also controls the cruise control system and torque converter lock-up system. Although this is not a critical malfunction, it may cause the cruise control and torque converter lock-up systems to not operate satisfactorily, which could affect the vehicle's handling and safety.

Although the vehicle may be drivable, it is recommended that this problem be corrected as soon as possible, especially if it is causing the safety systems to not function properly. It is better to prevent possible problems and eliminate the malfunction to restore normal system operation.

What repair will help eliminate the code? P0724?

Troubleshooting trouble code P0724 may include the following steps:

1. Checking the torque switch sensor “B” when braking: The sensor may be defective or have connection problems. Check it for damage and connections.
2. Replacing the sensor: If the sensor is defective, it must be replaced. This is usually a simple procedure, but it may take some time to access the sensor.
3. Checking wiring and electrical connections: Check the sensor wiring and connections for breaks, corrosion or other damage. Ensure a reliable connection.
4. Checking the cruise control system and torque converter lockup: After troubleshooting the sensor, check that the cruise control and torque converter lock-up systems are operating correctly.
5. Clearing the error code: After repairs are completed, it is necessary to perform a trouble code reset procedure using a diagnostic scanner. This will help clear the P0724 code from the vehicle's memory.

If you have no experience in auto repair or doubt your skills, it is recommended that you contact a qualified auto mechanic for diagnosis and repair.

How to Diagnose and Fix P0724 Engine Code - OBD II Trouble Code Explain

P0724 – Brand-specific information

Trouble code P0724 relates to the engine and transmission control system and can be found on various brands of cars, decoding for some brands:

• BMW: Torque converter/brake switch "B" circuit high voltage.
• Ford: There is a problem with the torque switch “B” sensor circuit when braking.
• Mercedes-Benz: There is a malfunction in the torque switch “B” sensor circuit during braking.
• Toyota: Torque converter/brake switch "B" circuit high voltage.

For specific interpretation and resolution of the problem, you should consult the repair manual for your specific vehicle model or consult a qualified auto mechanic who can diagnose and repair it.