AutoCodes – Toyota – P0798 2018 Toyota RAV4

P0798 2018 Toyota RAV4 Code - Pressure Control Solenoid 'C' Electrical

Quick Answer

Changing from 1st to 6th is performed by the Engine Control Module (ECM) turning shift solenoid valves SL1, SL2, SL3, SL4, and SL on and off. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Pressure Control Solenoid 'C' valve (Shift Solenoid Valve SL3). 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: P0798 2018 Toyota RAV4 indicates Pressure Control Solenoid 'C' Electrical.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Pressure Control Solenoid 'C' valve (Shift Solenoid Valve SL3).
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 443

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 Sep 12, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0798 2018 Toyota RAV4 Description

Changing from 1st to 6th is performed by the Engine Control Module (ECM) turning shift solenoid valves SL1, SL2, SL3, SL4, and SL on and off. If an open or short circuit occurs in any of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated.
The ECM commands gear shifts by turning the shift solenoid valves on and off. According to the input shaft speed, intermediate (counter) shaft speed, and output shaft speed, the ECM detects the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear). When the gear commanded by the ECM and the actual gear are not the same, the ECM illuminates the MIL and stores the Diagnostic Trouble Code (DTC).

OBDII Code P0798 2018 Toyota RAV4 - Pressure Control Solenoid 'C' Electrical - AutoCodes.com — P0798 2018 Toyota RAV4 Code - Pressure Control Solenoid 'C' Electrical

What does this mean?

What are the Possible Causes of the DTC P0798 2018 Toyota RAV4?

Low transmission fluid level
Dirty transmission fluid
Faulty Pressure Control Solenoid 'C' valve (Shift Solenoid Valve SL3)
Pressure Control Solenoid 'C' valve harness is open or shorted
Pressure Control Solenoid 'C' valve circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0798 2018 Toyota RAV4?

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 does this mean?

Code Tech Notes

When a transmission solenoid malfunction, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is dirty, it's recommended to change the transmission fluid and if possible, remove the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a mechanical transmission failure, and that the transmission will need to be rebuilt or replaced.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0798 2018 Toyota RAV4 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.

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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.

Frequently Asked Questions about P0798 2018 Toyota RAV4 Code

1. What are the common symptoms of OBDII code P0798 in a 2018 Toyota RAV4?

The common symptoms of OBDII code P0798 include harsh shifting, transmission slippage, and decreased fuel efficiency.

2. What does OBDII code P0798 indicate in a 2018 Toyota RAV4?

OBDII code P0798 in a 2018 Toyota RAV4 indicates a problem with the Pressure Control Solenoid 'C' electrical circuit.

3. What are the possible causes of OBDII code P0798 in a 2018 Toyota RAV4?

Possible causes of OBDII code P0798 in a 2018 Toyota RAV4 include a faulty pressure control solenoid 'C', damaged wiring or connectors, low transmission fluid, or a malfunctioning transmission control module.

4. How can I diagnose the Pressure Control Solenoid 'C' electrical issue causing OBDII code P0798 in my 2018 Toyota RAV4?

Diagnosing the issue involves checking the wiring and connectors for damage, testing the pressure control solenoid 'C' for proper operation, ensuring the transmission fluid level is correct, and scanning the transmission control module for any related fault codes.

5. Can I continue driving my 2018 Toyota RAV4 with OBDII code P0798?

It is not recommended to continue driving your 2018 Toyota RAV4 with OBDII code P0798, as it can lead to further transmission damage and potential safety hazards. It's best to address the issue promptly.

6. How can I repair OBDII code P0798 in a 2018 Toyota RAV4?

Repairing OBDII code P0798 involves fixing or replacing the pressure control solenoid 'C', repairing any damaged wiring or connectors, ensuring the transmission fluid is at the correct level, and clearing the fault code with a diagnostic tool.

7. Is it necessary to visit a mechanic for OBDII code P0798 in a 2018 Toyota RAV4?

While some DIY enthusiasts may be able to diagnose and repair OBDII code P0798, it is recommended to consult a qualified mechanic for a thorough diagnosis and proper repair to ensure the issue is addressed correctly.

8. How much does it cost to fix OBDII code P0798 in a 2018 Toyota RAV4?

The cost of fixing OBDII code P0798 in a 2018 Toyota RAV4 can vary depending on the exact cause of the issue, labor costs in your area, and whether any parts need to be replaced. It's advisable to get a few quotes from different mechanics.

9. Can a faulty pressure control solenoid 'C' cause other transmission issues besides triggering OBDII code P0798 in a 2018 Toyota RAV4?

Yes, a faulty pressure control solenoid 'C' can cause other transmission issues such as erratic shifting, gear slippage, and transmission overheating in a 2018 Toyota RAV4.

10. How can I prevent OBDII code P0798 from occurring in my 2018 Toyota RAV4?

To prevent OBDII code P0798 in your 2018 Toyota RAV4, it is important to maintain regular transmission fluid checks and changes, address any transmission issues promptly, and ensure proper maintenance of the vehicle's electrical system.