P0719 Torque reduction sensor "B" circuit low when braking

P0719 – OBD-II Trouble Code Technical Description

Trouble code P0719 indicates that the PCM has received abnormal voltage readings from the torque reduction sensor "B" circuit during braking.

What does trouble code P0719 mean?

Trouble code P0719 indicates that the engine control module (PCM) has received abnormal or abnormal voltage readings from the torque off sensor "B" circuit. This code is usually associated with the brake light switch, which monitors the brake pedal and plays an important role in the operation of the torque converter lockup and cruise control systems. When P0719 appears, it indicates potential problems with this system that could make it difficult for the transmission to operate properly and control the vehicle.

Possible reasons

Some possible reasons for the P0719 trouble code:

• Brake light switch malfunction: The switch itself may be damaged or faulty, causing the brake pedal to be incorrectly signaled.
• Wiring and connections: The wiring or connectors connecting the brake light switch to the PCM may be damaged, broken, or oxidized, causing an incorrect or loose connection.
• PCM malfunction: The engine control module (PCM) itself may be damaged or malfunctioning, causing it to incorrectly interpret signals from the brake light switch.
• Problems with the brake pedal: A defect or malfunction in the brake pedal may cause the brake light switch to not operate properly.
• Electrical problems: General electrical problems such as short circuits or blown fuses can also cause P0719.

Diagnosis is carried out by testing the above components using appropriate vehicle equipment.

What are the symptoms of a fault code? P0719?

Symptoms for DTC P0719 may include the following:

• Brake lights do not work: One of the most obvious symptoms is inoperative brake lights, as the brake light switch "B" may be damaged or faulty.
• Cruise control malfunction: If the brake light switch also communicates with the cruise control system, its malfunction may cause the system to not operate properly.
• Check Engine Light: Typically, when a P0719 code appears, the Check Engine light on your vehicle's dashboard will come on.
• Transmission problems: In rare cases, improper operation of the brake light switch can affect transmission performance as it partially controls the torque converter lock-up system.
• Disabling cruise control: It is possible that if the brake light switch malfunctions, the cruise control system will be automatically disabled.

How to diagnose a fault code P0719?

The following steps are recommended to diagnose DTC P0719:

1. Check brake lights: Check the operation of the brake lights. If they don't work, it may indicate a problem with the brake light switch.
2. Use a diagnostic scanner: Connect a diagnostic scanner to the OBD-II port and read the error codes. If a P0719 code is detected, it confirms that there is a problem with the brake light switch.
3. Check the brake light switch: Check the brake light switch and its connections for damage, corrosion, or broken wiring.
4. Check the brake pedal: Check the condition and operation of the brake pedal. Make sure it interacts correctly with the brake light switch.
5. Check PCM: Check the engine control module (PCM) for any malfunctions or failures that could cause P0719.
6. Check the electrical circuit: Check the torque off sensor "B" circuit for a short, open, or other electrical problem.
7. Repair or replace: Depending on the diagnostic results, repair or replace the identified defects or malfunctions.

Diagnostic errors

When diagnosing DTC P0719, the following errors may occur:

• Misinterpretation of symptoms: One of the mistakes may be misinterpretation of symptoms. For example, if the brake lights are working normally but the P0719 code is still active, it may indicate other electrical problems.
• Insufficient diagnosis: Failure to pay enough attention to checking all components associated with the brake light switch may result in the source of the problem being incorrectly identified.
• Malfunctions in other systems: The P0719 code can be caused not only by a faulty brake light switch, but also by other problems such as damaged wiring or a malfunction in the PCM. Missing such possible causes can lead to further problems.
• Incorrect problem fix: Attempting to correct a problem without proper diagnosis or lack of attention to detail may result in incorrect repairs or component replacements that may not solve the problem or may result in additional problems.

It is important to conduct a thorough diagnosis, paying attention to all possible causes and components associated with the P0719 code to avoid mistakes and ensure a successful resolution of the problem.

How serious is the fault code? P0719?

Trouble code P0719, indicating a problem with the brake light switch “B”, is not critical, but it requires careful attention and timely resolution. It is important to note that this code can cause your brake lights to not work, which increases the risk of an accident, especially when braking or slowing down. Additionally, the brake light switch “B” may also be part of the cruise control system, and a malfunction may cause the system to not operate properly. So, while the P0719 code is not a safety critical code, it should be seriously considered and addressed promptly to avoid potential problems down the road.

What repair will help eliminate the code? P0719?

Troubleshooting trouble code P0719 may include the following steps:

1. Checking the brake light switch: First, check the brake light switch “B” itself for damage or defects. It may need to be cleaned or replaced.
2. Wiring check: Check the electrical wiring, connections and connectors associated with the brake light switch. Detection of damage, breaks or corrosion may require repair or replacement.
3. Check pedals harassment: Make sure that the brake pedal interacts correctly with the brake light switch and that its mechanism operates correctly. If the brake pedal does not activate the brake light switch when pressed, it may need adjustment or replacement.
4. Checking the Engine Control Module (PCM): If all the above checks do not resolve the problem, the cause may be a faulty engine control module (PCM). In this case, it will need to be diagnosed and possibly replaced or repaired.
5. Clearing the error code: After eliminating the cause of the malfunction and carrying out the appropriate repair or replacement, it is necessary to clear the error code using a diagnostic scanner.

If you are unsure of your skills or experience in performing this work, it is recommended that you contact a qualified auto mechanic or auto repair shop for diagnosis and repair.

What is P0719 Engine Code [Quick Guide]

P0719 – Brand-specific information

Trouble code P0719 can occur on different makes and models of vehicles. Below is a list of some car brands with a P0719 code:

1. Ford: On Ford vehicles, the P0719 code may be related to problems with the brake light switch.
2. Chevrolet: For Chevrolet, this code may indicate problems with the transmission fluid level sensor or brake light switch.
3. Toyota: On Toyota vehicles, the P0719 code may indicate problems with the brake light switch or signal circuit.
4. Sling: For Honda, this code may also indicate problems with the brake light switch or electrical circuit.
5. Volkswagen: On Volkswagen vehicles, the P0719 code may be related to the transmission fluid pressure sensor or brake light switch.
6. BMW: For BMW, this code may indicate problems with the electrical circuit or transmission fluid level sensor or brake light switch.

It is important to note that the specifications and interpretation of error codes may vary depending on the specific model and year of the vehicle, so it is recommended that you consult the repair or service manual for your specific vehicle make and model for an accurate diagnosis.