Engine-CodesGeneric – P084C

P084C Code - Transmission Fluid Pressure Sensor/Switch 'H' Circuit Low

Quick Answer

The P084C diagnostic trouble code (DTC) indicates that there is a problem with the Transmission Fluid Pressure Sensor/Switch 'H' Circuit Low. Common causes include Faulty transmission fluid pressure sensor/switch, Damaged wiring or connectors in the sensor circuit, Low transmission fluid levels. 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
P084C indicates Transmission Fluid Pressure Sensor/Switch 'H' Circuit Low.
Common causes
Common causes include Faulty transmission fluid pressure sensor/switch, Damaged wiring or connectors in the sensor circuit, Low transmission fluid levels.
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.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P084C Description

The P084C diagnostic trouble code (DTC) indicates that there is a problem with the Transmission Fluid Pressure Sensor/Switch 'H' Circuit Low. This sensor is responsible for monitoring and regulating the transmission fluid pressure within the transmission system. The transmission fluid pressure is essential for proper shifting, torque converter operation, and overall performance of the transmission system.

OBDII Code P084C - Transmission Fluid Pressure Sensor/Switch 'H' Circuit Low
P084C Code - Transmission Fluid Pressure Sensor/Switch 'H' Circuit Low

Common Causes of P084C

  1. Faulty transmission fluid pressure sensor/switch
  2. Damaged wiring or connectors in the sensor circuit
  3. Low transmission fluid levels
  4. Clogged transmission filter
  5. Internal transmission leaks

Symptoms of P084C

  1. Harsh shifting
  2. Delayed engagement when shifting gears
  3. Slipping gears
  4. Transmission going into limp mode
  5. Illumination of the Check Engine Light

How to Fix P084C

  1. Perform a diagnostic scan to confirm the P084C code and identify the specific cause.
  2. Inspect the transmission fluid pressure sensor/switch for any signs of damage or malfunction.
  3. Check the wiring and connectors in the sensor circuit for any breaks, corrosion, or loose connections.
  4. Inspect the transmission fluid level and quality, top up or replace the fluid if necessary.
  5. Replace the transmission fluid pressure sensor/switch if it is found to be faulty, and clear the code from the vehicle's computer.

Cost to Fix P084C

The typical repair costs for addressing the P084C code can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Most auto repair shops commonly charge between $80 and $150 per hour for labor.

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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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