AutoCodes – Toyota – C120C 2018 Toyota RAV4

C120C 2018 Toyota RAV4 Code - Linear Solenoid Power Supply System Malfunction

Quick Answer

This Diagnostic Trouble Code (DTC) is output by the Four-Wheel Drive (4WD) ECU Assembly if a malfunction occurs in the linear solenoid power supply system. Common causes include Faulty Four-Wheel Drive (4WD) ECU Assembly, 4WD ECU Assembly harness is open or shorted, 4WD ECU Assembly 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: C120C 2018 Toyota RAV4 indicates Linear Solenoid Power Supply System Malfunction.
Common causes: Common causes include Faulty Four-Wheel Drive (4WD) ECU Assembly, 4WD ECU Assembly harness is open or shorted, 4WD ECU Assembly 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 236

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 Jan 18, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C120C 2018 Toyota RAV4 Description

This Diagnostic Trouble Code (DTC) is output by the Four-Wheel Drive (4WD) ECU Assembly if a malfunction occurs in the linear solenoid power supply system.

OBDII Code C120C 2018 Toyota RAV4 - Linear Solenoid Power Supply System Malfunction - AutoCodes.com — C120C 2018 Toyota RAV4 Code - Linear Solenoid Power Supply System Malfunction

What does this mean?

What are the Possible Causes of the DTC C120C 2018 Toyota RAV4?

Faulty Four-Wheel Drive (4WD) ECU Assembly
4WD ECU Assembly harness is open or shorted
4WD ECU Assembly circuit poor electrical connection

How to Fix the DTC C120C 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C120C 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.

Need more information about the C120C 2018 Toyota RAV4 code?

Need more information on how to fix the C120C 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C120C 2018 Toyota RAV4 code diagnosed by a professional: Find a repair shop in your area

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 C120C 2018 Toyota RAV4 Code

1. What are the common symptoms of OBDII code C120C in a 2018 Toyota RAV4?

The common symptoms of OBDII code C120C in a 2018 Toyota RAV4 include rough shifting, transmission slipping, and illuminated Check Engine Light.

2. What does the OBDII code C120C indicate in a 2018 Toyota RAV4?

OBDII code C120C in a 2018 Toyota RAV4 indicates a Linear Solenoid Power Supply System malfunction within the transmission control module.

3. What are the possible causes of the Linear Solenoid Power Supply System malfunction in a 2018 Toyota RAV4?

Possible causes of the Linear Solenoid Power Supply System malfunction in a 2018 Toyota RAV4 include faulty wiring, a defective linear solenoid, or issues with the transmission control module.

4. How can I diagnose OBDII code C120C in my 2018 Toyota RAV4?

Diagnosing OBDII code C120C in a 2018 Toyota RAV4 typically involves using a scan tool to retrieve the code, checking the wiring and connectors for any issues, and testing the linear solenoid for proper functionality.

5. Can I continue driving my 2018 Toyota RAV4 with OBDII code C120C?

It is not recommended to continue driving your 2018 Toyota RAV4 with OBDII code C120C, as it can lead to further transmission issues and potential damage if left unaddressed.

6. How can I repair OBDII code C120C in my 2018 Toyota RAV4?

Repairing OBDII code C120C in a 2018 Toyota RAV4 may involve repairing or replacing damaged wiring, replacing the faulty linear solenoid, or reprogramming the transmission control module.

7. Is it necessary to reset the OBDII code C120C after repairing the issue in a 2018 Toyota RAV4?

Yes, it is recommended to reset the OBDII code C120C after repairing the issue in a 2018 Toyota RAV4 to clear the fault code and ensure the proper operation of the transmission system.

8. Can a DIY enthusiast fix OBDII code C120C in a 2018 Toyota RAV4?

While some aspects of diagnosing and repairing OBDII code C120C in a 2018 Toyota RAV4 may be within reach of a DIY enthusiast, it is recommended to consult a professional mechanic for proper diagnosis and repair.

9. How much does it typically cost to repair OBDII code C120C in a 2018 Toyota RAV4?

The cost of repairing OBDII code C120C in a 2018 Toyota RAV4 can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Are there any preventative maintenance tips to avoid OBDII code C120C in a 2018 Toyota RAV4?

To help prevent OBDII code C120C in a 2018 Toyota RAV4, it is advisable to follow the manufacturer's recommended maintenance schedule, address any transmission-related issues promptly, and avoid harsh driving habits.