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P0712 Infiniti Code - Transmission Fluid Temperature Sensor Low Input

Quick Answer

The P0712 code for Infiniti vehicles indicates a low input signal from the transmission fluid temperature sensor. Common causes include Faulty Sensor: The most common cause of the P0712 code is a faulty transmission fluid temperature sensor, Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can also trigger this code, Low Fluid Level: Insufficient transmission fluid can affect the temperature sensor's readings, leading to a low input signal. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0712 Infiniti indicates Transmission Fluid Temperature Sensor Low Input.
Common causes
Common causes include Faulty Sensor: The most common cause of the P0712 code is a faulty transmission fluid temperature sensor, Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can also trigger this code, Low Fluid Level: Insufficient transmission fluid can affect the temperature sensor's readings, leading to a low input signal.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0712 Infiniti Description

The P0712 code for Infiniti vehicles indicates a low input signal from the transmission fluid temperature sensor. This sensor plays a crucial role in monitoring the temperature of the transmission fluid, which is vital for the proper functioning of the transmission system. The transmission fluid temperature affects the viscosity of the fluid, which in turn impacts the efficiency of the transmission's operation.

OBDII Code P0712 Infiniti - Transmission Fluid Temperature Sensor Low Input
P0712 Infiniti Code - Transmission Fluid Temperature Sensor Low Input

Common Causes of P0712 Infiniti

  1. Faulty Sensor: The most common cause of the P0712 code is a faulty transmission fluid temperature sensor.
  2. Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can also trigger this code.
  3. Low Fluid Level: Insufficient transmission fluid can affect the temperature sensor's readings, leading to a low input signal.
  4. Transmission Fluid Contamination: Contaminated or degraded transmission fluid can impact the sensor's performance.
  5. ECM Malfunction: A malfunctioning engine control module may also be responsible for the P0712 code.

Symptoms of P0712 Infiniti

  1. Check Engine Light: The most common symptom associated with the P0712 code is the illumination of the check engine light on the dashboard.
  2. Erratic Shifting: The transmission may exhibit erratic shifting behavior, such as harsh or delayed shifts.
  3. Decreased Fuel Efficiency: A low input signal from the transmission fluid temperature sensor can lead to decreased fuel efficiency due to suboptimal transmission operation.
  4. Overheating: In some cases, the transmission may overheat due to incorrect temperature readings from the sensor.

How to Fix P0712 Infiniti

  1. Diagnostic Check: Begin by performing a thorough diagnostic check to confirm the P0712 code and identify the underlying cause.
  2. Replace Sensor: If the sensor is found to be faulty, replace it with a new, OEM-quality sensor.
  3. Check Wiring: Inspect the wiring harness for any damage or corrosion, and repair or replace as needed.
  4. Fluid Level Check: Ensure the transmission fluid level is at the appropriate level and top up if necessary.
  5. Clear Codes: After completing the repair, clear the diagnostic trouble codes and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0712 Infiniti

The cost of repairing the P0712 code in an Infiniti vehicle can vary depending on the specific model, the location of the repair shop, and the extent of the repairs needed. On average, the cost of replacing a transmission fluid temperature sensor ranges from $100 to $200, including parts and labor. Additional costs may be incurred if wiring repairs or other components need attention. It's advisable to consult with a qualified mechanic or dealership for a more accurate estimate based on your vehicle's specific requirements. Keep in mind that labor rates can vary significantly, so it's essential to research local rates to get a better idea of the total repair costs.

When is the Code Detected?

Transmission Control Module (TCM) detects excessively low voltage from the fluid temperature sensor.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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