What are the common causes of the P0719 code on a Nissan?

cause_speed_sensor_in, cause_transmission_fluid, cause_wiring_damage

How much does it cost to fix the P0719 code?

The estimated repair cost for the P0719 code is $150 - $600. This includes parts and labor.

P0719Nissan MaximaAnnées: 1996 - 2026

Input/Turbine Speed Sensor Circuit Torque Converter/Brake Switch B Circuit High

Vérifié par un technicien certifié ASE

Est-il sûr de conduire ?Driving with P0719 is highly risky. A malfunctioning input/turbine speed sensor can cause unpredictable and harsh transmission shifts, delayed engagement, or even a complete loss of drive, leading to a dangerous situation, especially at higher speeds or in traffic. Simultaneously, a faulty brake switch can disable critical safety features like ABS, traction control, and cruise control, and may cause brake lights to malfunction (stay on or not illuminate), significantly increasing the risk of a collision. The combined effect of these issues severely compromises vehicle control and safety.

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Qu'est-ce que cela signifie ?

Code P0719 indicates a problem with the transmission input/turbine speed sensor.

Avertissement : Ce code de diagnostic fait partie du système OBD2 standard et peut s'appliquer aux modèles Nissan Maxima fabriqués de 1996 à 2026. Cependant, veuillez noter que la présence de ce code dépend de la configuration exacte du moteur, des options et de l'année de production.

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Causes courantes

Capteur de vitesse d'entrée/turbine défectueux

Liquide de transmission bas, sale ou brûlé

Faisceau de câblage endommagé ou cassé

Symptômes à surveiller

Le voyant moteur est allumé
La transmission glisse entre les vitesses
Changement de vitesse brutal
La transmission reste bloquée sur un rapport

Comment Diagnostiquer

Thorough Scan Tool Analysis & Freeze Frame Data Review: Connect a professional-grade scan tool. Beyond just reading P0719, examine the freeze frame data to understand the engine speed, vehicle speed, transmission fluid temperature, and brake switch status at the moment the code was set. Check for any pending or historical codes, especially those related to transmission speed sensors (P0715, P0716, P0717, P0718) or brake switch circuits (e.g., P0504, P0571, P0572, P0573). This helps determine if the issue is intermittent or constant and which component's "high" signal is the primary trigger.

Comprehensive Brake Switch B Circuit Inspection and Testing: Locate the brake pedal position sensor/switch (often there are multiple switches or circuits within one unit). Visually inspect its wiring and connector for damage, corrosion, or improper seating. Using a digital multimeter (DMM) or oscilloscope, back-probe the brake switch B circuit at the switch and at the Transmission Control Module (TCM) or Powertrain Control Module (PCM) connector. Verify the voltage signal when the brake pedal is released and pressed. A "high" condition typically means the circuit is seeing battery voltage when it should be at a lower voltage or ground, or the switch is internally shorted, sending a constant high signal. Check for proper brake light operation and cruise control disengagement as these are often tied to brake switch inputs.

Input/Turbine Speed Sensor Circuit Integrity Check: Access the input/turbine speed sensor. Disconnect its electrical connector and perform a thorough visual inspection for bent pins, corrosion, or damaged wiring. Using a DMM, check for proper reference voltage (typically 5V or 12V) and a good ground at the sensor connector from the TCM/PCM. Then, test the sensor's internal resistance (if it's a magnetic pickup type) or its signal output (if it's a Hall effect sensor) by back-probing the signal wire while rotating the transmission input shaft (if accessible) or by monitoring live data during a road test. Look for erratic signals, no signal, or a constantly high voltage signal that doesn't fluctuate with speed.

Wiring Harness Inspection for Shorts to Voltage: Given the "Circuit High" aspect of the code, meticulously inspect the entire wiring harness for both the input/turbine speed sensor and the brake switch B circuit. Pay close attention to areas where the harness passes through firewalls, near exhaust components, or sharp edges, as chafing can lead to a short to battery voltage. Use a wiring diagram to identify common power sources or adjacent circuits that could be shorting into the affected wires. Perform continuity and resistance checks on the individual wires from the sensor/switch to the TCM/PCM to rule out internal wire damage or shorts.

Solutions Courantes

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.

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Estimation de réparation

$150 - $600

Pièces$30 - $300

Main-d'œuvre$180 - $600

Difficulté de réparation (DIY)

Difficile

Autres codes Nissan populaires

P0101 P0106 P0112

Input/Turbine Speed Sensor Circuit Torque Converter/Brake Switch B Circuit High

Vérifié par un technicien certifié ASE

Qu'est-ce que cela signifie ?

Code P0719 indicates a problem with the transmission input/turbine speed sensor.

Comment Diagnostiquer

Solutions Courantes

Qu'est-ce que cela signifie ?

Causes courantes

Symptômes à surveiller

Comment Diagnostiquer

Solutions Courantes

Join the Discussion

Estimation de réparation

Difficulté de réparation (DIY)

Autres codes Nissan populaires

Scanning Engine...

Qu'est-ce que cela signifie ?

Causes courantes

Symptômes à surveiller

Comment Diagnostiquer

Solutions Courantes

Join the Discussion

Estimation de réparation

Difficulté de réparation (DIY)

Autres codes Nissan populaires