Transmission Fluid Pressure Sensor/Switch ‘C’ Circuit High
Table of contents
P0873 TOYOTA Possible Causes
- 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 do I fix code P0873 TOYOTA?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P0873 TOYOTA code
The cost of diagnosing the P0873 TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
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.