Input/Turbine Speed Sensor Circuit Torque Converter/Brake Switch B Circuit High
What does this mean?
Code P0719 indicates a problem with the transmission input/turbine speed sensor.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Subaru Wrx models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
Common Causes
Faulty input/turbine speed sensor
Low, dirty, or burnt transmission fluid
Damaged, chafed, or broken wiring harness
Symptoms to Watch For
- Check Engine Light is illuminated
- Transmission slipping between gears
- Hard or harsh gear shifting
- Transmission stuck in one gear
How to Diagnose
Common Solutions
Replace the Brake Pedal Position Sensor/Switch (Brake Switch B): If testing confirms the brake switch B circuit is consistently sending a "high" voltage signal when it shouldn't, or if the switch is internally shorted, replacing this component is the most direct solution.
Repair or Replace Damaged Wiring/Connectors: Address any identified shorts to voltage, open circuits, chafed insulation, or corroded/loose terminals within the wiring harness for either the input/turbine speed sensor or the brake switch B circuit. This often involves splicing in new wire sections or replacing connector pigtails.
Replace the Input/Turbine Speed Sensor: If the sensor itself is found to be faulty after thorough testing (e.g., incorrect resistance, no signal, or an erratic signal that doesn't correlate with actual input shaft speed), replacing it will resolve the issue.
Diagnose and Repair Short to Voltage in Shared Circuits: In some vehicles, these circuits might share a common power or ground source, or run in close proximity. If a short to voltage is identified in a shared harness section, isolating and repairing that specific short will resolve the "high" condition for the affected circuit.