AutoCodes – Toyota – P0873 Toyota

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

Quick Answer

The Automatic Transmission Fluid (ATF) pressure switch No. Common causes include Faulty Automatic Transmission Fluid (ATF) Temperature Sensor Assembly, ATF Temperature Sensor harness is open or shorted, ATF Temperature Sensor circuit poor electrical connection. 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 Automatic Transmission Fluid (ATF) Temperature Sensor Assembly, ATF Temperature Sensor harness is open or shorted, ATF Temperature Sensor circuit poor electrical connection.
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.

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Code Popularity 2,273

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0873 Toyota Description

The Automatic Transmission Fluid (ATF) pressure switch No. 1 is installed in the shift solenoid valve ATF output passage. This switch is used to identify the malfunctioning part when a fail-safe operation is performed. If the shift solenoid valve malfunctions when the ATF pressure switch has a malfunction, a fail-safe operation will be performed. This fail-safe operation is different from the fail-safe operation performed when the solenoid valve malfunctions, and the ATF pressure switch is normal.
The Diagnostic Trouble Code (DTC) will set if the ATF pressure switch No. 1 ON is detected twice when any of the gears from 1st to 4th engages normally.

OBDII Code P0873 Toyota - Transmission Fluid Pressure Sensor/Switch 'C' Circuit High - AutoCodes.com — P0873 Toyota Code - Transmission Fluid Pressure Sensor/Switch 'C' Circuit High

What does this mean?

What are the Possible Causes of the DTC P0873 Toyota?

Faulty Automatic Transmission Fluid (ATF) Temperature Sensor Assembly
ATF Temperature Sensor harness is open or shorted
ATF Temperature Sensor circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P0873 Toyota?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0873 Toyota code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0873 Toyota code?

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Information for Specific Toyota Models

P0873 2006 Toyota Camry — Transmission Fluid Pressure Sensor/Switch 'C' Circuit High
P0873 2007 Toyota Camry — Transmission Fluid Pressure Sensor/Switch 'C' Circuit High
P0873 2008 Toyota Camry — Transmission Fluid Pressure Sensor/Switch 'C' Circuit High
P0873 2009 Toyota Camry — Transmission Fluid Pressure Sensor/Switch 'C' Circuit High
P0873 2010 Toyota Camry — Transmission Fluid Pressure Sensor/Switch 'C' Circuit High
P0873 2011 Toyota Camry — Transmission Fluid Pressure Sensor/Switch 'C' Circuit High

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.