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P0873 Toyota Code - Transmission Fluid Pressure Sensor/Switch 'C' Circuit High

Quick Answer

The P0873 code for Toyota vehicles indicates a problem with the Transmission Fluid Pressure Sensor/Switch 'C' Circuit being too high. Common causes include Faulty transmission fluid pressure sensor/switch, Wiring issues in the circuit, Clogged transmission filter. 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
P0873 Toyota indicates Transmission Fluid Pressure Sensor/Switch 'C' Circuit High.
Common causes
Common causes include Faulty transmission fluid pressure sensor/switch, Wiring issues in the circuit, Clogged transmission filter.
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 11, 2024
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Code P0873 Toyota Description

The P0873 code for Toyota vehicles indicates a problem with the Transmission Fluid Pressure Sensor/Switch 'C' Circuit being too high. This sensor is responsible for monitoring the fluid pressure within the transmission system and sending this information to the vehicle's computer. When the pressure is too high, it can lead to various issues with the transmission's operation.

OBDII Code P0873 Toyota - Transmission Fluid Pressure Sensor/Switch 'C' Circuit High
P0873 Toyota Code - Transmission Fluid Pressure Sensor/Switch 'C' Circuit High

Common Causes of P0873 Toyota

  1. Faulty transmission fluid pressure sensor/switch
  2. Wiring issues in the circuit
  3. Clogged transmission filter
  4. Malfunctioning transmission pump
  5. Low transmission fluid levels

Symptoms of P0873 Toyota

  1. Harsh or delayed shifting of gears
  2. Transmission slipping or jerking
  3. Lack of power or acceleration
  4. Transmission going into fail-safe mode
  5. Illumination of the Check Engine Light

How to Fix P0873 Toyota

  1. Begin by using a scan tool to read the code and identify the specific cause of the high transmission fluid pressure.
  2. Inspect the transmission fluid pressure sensor/switch and the wiring harness for any signs of damage or corrosion.
  3. Check the transmission filter for any clogs or debris that could be causing the high pressure.
  4. Test the transmission pump to ensure it is functioning correctly and not producing excessive pressure.
  5. If necessary, replace the faulty sensor/switch, repair any damaged wiring, clean or replace the transmission filter, or repair/replace the transmission pump as needed.

Cost to Fix P0873 Toyota

The typical repair costs for resolving a P0873 code on a Toyota vehicle can range from $200 to $500, depending on the specific cause of the issue and the extent of the repairs needed. This estimate includes parts and labor, but it is essential to note that actual costs may vary based on factors such as location, vehicle make and model, and the level of expertise of the auto repair shop. It is advisable to consult with a professional mechanic to get an accurate cost estimate for this repair.

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Information for Specific Toyota Models

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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