AutoCodes – Toyota – P0798 2017 Toyota RAV4

P0798 2017 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 2017 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 365

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 2017 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 2017 Toyota RAV4 - Pressure Control Solenoid 'C' Electrical - AutoCodes.com — P0798 2017 Toyota RAV4 Code - Pressure Control Solenoid 'C' Electrical

What does this mean?

What are the Possible Causes of the DTC P0798 2017 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 2017 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 2017 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 2017 Toyota RAV4 Code

1. What does OBDII code P0798 mean on a 2017 Toyota RAV4?

P0798 indicates an electrical issue with the Pressure Control Solenoid 'C', which is responsible for regulating hydraulic pressure in the transmission.

2. What are the common symptoms of code P0798 in a 2017 Toyota RAV4?

Symptoms may include harsh or delayed shifting, transmission slipping, poor fuel economy, or the vehicle going into limp mode.

3. What causes the P0798 code to appear in a Toyota RAV4?

Common causes include a faulty pressure control solenoid, wiring issues (such as damaged or corroded connectors), low transmission fluid, or a malfunctioning transmission control module (TCM).

4. Can I still drive my 2017 Toyota RAV4 with a P0798 code?

While the vehicle may still be drivable, driving with this code can cause further damage to the transmission. Itâ€™s best to address the issue promptly.

5. How do I diagnose the P0798 code in a Toyota RAV4?

Start by checking the transmission fluid level and condition. Then inspect the wiring and connectors to the pressure control solenoid for damage or corrosion. If no issues are found, test the solenoid using a multimeter.

6. How do I fix the P0798 code on my 2017 Toyota RAV4?

Repairs may involve replacing the faulty pressure control solenoid, repairing or replacing damaged wiring, cleaning corroded connections, or, in rare cases, updating or replacing the TCM.

7. How much does it cost to repair a P0798 issue in a Toyota RAV4?

The cost varies depending on the repair. Replacing a pressure control solenoid can cost between $200 and $400, while wiring repairs may be less expensive.

8. Can low transmission fluid cause a P0798 code on a 2017 RAV4?

Yes, low or contaminated transmission fluid can affect the performance of the pressure control solenoid and trigger a P0798 code.

9. Does the P0798 code always mean the solenoid is bad?

No, the issue could also be caused by wiring problems, a bad connection, or issues with the TCM, so a full diagnostic is recommended.

10. Will clearing the P0798 code with a scanner fix the problem?

Clearing the code may temporarily turn off the check engine light, but the issue causing the code will remain and the light will likely return until proper repairs are made.