DTC P0719 Torque Converter/Brake Switch B Circuit Low

DTC P0719 is indicative of a low voltage situation detected in the Torque Converter/Brake Switch B Circuit. This code is registered when the Powertrain Control Module (PCM) identifies a voltage signal lower than expected in the circuit related to the torque converter or brake switch B.

1. What does P0719 code mean?

DTC P0719 indicates that the voltage signal in the Torque Converter/Brake Switch B Circuit is registering lower than the expected range set by the PCM.

2. What are the causes of DTC P0719?

Several potential causes of DTC P0719 include:

  • Faulty Torque Converter/Brake Switch: A malfunctioning torque converter or brake switch causing low voltage output.
  • Damaged Wiring: Worn, broken, or shorted wiring associated with the Torque Converter/Brake Switch B Circuit.
  • Poor Electrical Connections: Corrosion, loose, or poor connections in the circuit causing a drop in voltage.
  • PCM or Module Failure: A rare possibility where the PCM or related module might be malfunctioning, causing incorrect voltage readings.

3. What are the symptoms of DTC P0719?

Symptoms commonly associated with DTC P0719 may include:

  • Check Engine Light: Illumination of the Check Engine Light indicating a fault.
  • Transmission Issues: Possible transmission-related problems such as erratic shifting, hesitation, or even failure to shift gears.
  • Brake Light Malfunction: Malfunction or illumination of the brake warning light due to the brake switch’s involvement.

4. How to diagnose DTC P0719?

Diagnosing DTC P0719 might involve the following steps:

  • OBD-II Scanner: Use an OBD-II scanner to retrieve the trouble code and assess other related codes stored in the PCM.
  • Visual Inspection: Inspect the torque converter, brake switch, and associated wiring for visible damage or wear.
  • Voltage Testing: Measure voltage levels at various points in the Torque Converter/Brake Switch B Circuit to identify the low voltage area.
  • Circuit Integrity Testing: Conduct tests to assess the integrity of the circuit, including continuity and resistance checks.

5. How to fix DTC P0719 problem?

Resolving DTC P0719 might involve these actions:

  • Repair or Replace Components: Repair damaged wiring or replace the faulty torque converter/brake switch.
  • Connector Maintenance: Clean or replace connectors to ensure secure and proper connections.
  • Resetting Codes: Use the OBD-II scanner to clear codes after fixing the issue and reset the Check Engine Light.
  • Professional Assistance: Seek help from a certified technician for complex electrical diagnostics or module-related problems.


Addressing DTC P0719 necessitates a comprehensive check of the Torque Converter/Brake Switch B Circuit to rectify low voltage issues, ensuring proper transmission functionality and optimal vehicle performance. Swiftly addressing the root cause is crucial to prevent potential transmission-related problems.