AutoCodes – Toyota – C120C 2017 Toyota RAV4

C120C 2017 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 2017 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 346

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 2017 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 2017 Toyota RAV4 - Linear Solenoid Power Supply System Malfunction - AutoCodes.com — C120C 2017 Toyota RAV4 Code - Linear Solenoid Power Supply System Malfunction

What does this mean?

What are the Possible Causes of the DTC C120C 2017 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 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C120C 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.

Need more information about the C120C 2017 Toyota RAV4 code?

Need more information on how to fix the C120C 2017 Toyota RAV4 code? Get Access to Factory Service Manuals

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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 C120C 2017 Toyota RAV4 Code

1. What are the common symptoms of OBDII code C120C in a 2017 Toyota RAV4?

- Common symptoms include rough shifting, hesitation during acceleration, and illuminated check engine light.

2. What does the OBDII code C120C indicate in a 2017 Toyota RAV4?

- This code indicates a Linear Solenoid Power Supply System Malfunction in the transmission.

3. What are the possible causes of OBDII code C120C in a 2017 Toyota RAV4?

- Possible causes include faulty linear solenoids, wiring issues, low transmission fluid levels, or a malfunctioning transmission control module.

4. How can I diagnose the cause of OBDII code C120C in my 2017 Toyota RAV4?

- Diagnosing this code may require a professional scan tool to check for specific transmission-related trouble codes and conducting a thorough inspection of the transmission components.

5. Can I continue driving my 2017 Toyota RAV4 with OBDII code C120C?

- It is not recommended to continue driving with this code as it can lead to further damage to the transmission and potentially cause safety issues.

6. How can I repair OBDII code C120C in my 2017 Toyota RAV4?

- Repair options may include replacing faulty linear solenoids, repairing wiring issues, ensuring proper transmission fluid levels, or reprogramming the transmission control module.

7. Is it possible to reset OBDII code C120C in a 2017 Toyota RAV4 by clearing the fault codes?

- Clearing the fault codes using an OBDII scanner may temporarily turn off the check engine light, but the underlying issue causing the code will need to be addressed to prevent it from reoccurring.

8. Are there any DIY tips for addressing OBDII code C120C in a 2017 Toyota RAV4?

- DIY enthusiasts can start by checking the transmission fluid level and condition, inspecting the wiring harness for any visible damage, and ensuring all connectors are securely plugged in.

9. How much does it typically cost to repair OBDII code C120C in a 2017 Toyota RAV4 at a professional auto repair shop?

- The cost of repairing this code can vary depending on the exact cause, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can OBDII code C120C in a 2017 Toyota RAV4 cause long-term damage if left untreated?

- Yes, leaving this code untreated can potentially lead to more severe transmission issues, reduced fuel efficiency, and a higher risk of transmission failure over time.