Engine-CodesToyota – C120C 2017 Toyota RAV4

C120C 2017 Toyota RAV4 Code - Linear Solenoid Power Supply System Malfunction

Quick Answer

The C120C diagnostic trouble code (DTC) for a 2017 Toyota RAV4 refers to a Linear Solenoid Power Supply System Malfunction. Common causes include Faulty linear solenoid, Damaged wiring or connectors in the power supply system, Issues with the transmission control module. 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 linear solenoid, Damaged wiring or connectors in the power supply system, Issues with the transmission control module.
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.
Table of contents Created and updated by William Orellana on Sep 29, 2024
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Code C120C 2017 Toyota RAV4 Description

The C120C diagnostic trouble code (DTC) for a 2017 Toyota RAV4 refers to a Linear Solenoid Power Supply System Malfunction. This code indicates that there is an issue with the power supply system for the linear solenoid within the vehicle's transmission. The linear solenoid is responsible for controlling the flow of transmission fluid within the transmission, which is crucial for smooth gear shifting and overall transmission performance.

OBDII Code C120C 2017 Toyota RAV4 - Linear Solenoid Power Supply System Malfunction
C120C 2017 Toyota RAV4 Code - Linear Solenoid Power Supply System Malfunction

Common Causes of C120C 2017 Toyota RAV4

  1. Faulty linear solenoid
  2. Damaged wiring or connectors in the power supply system
  3. Issues with the transmission control module
  4. Low transmission fluid levels
  5. Electrical issues within the transmission system

Symptoms of C120C 2017 Toyota RAV4

  1. Harsh or delayed shifting
  2. Transmission slipping
  3. Illuminated check engine light
  4. Decreased fuel efficiency
  5. Lack of power

How to Fix C120C 2017 Toyota RAV4

  1. Begin by performing a thorough diagnostic scan to confirm the C120C code and identify any other related codes.
  2. Inspect the linear solenoid, wiring, and connectors for any signs of damage or wear.
  3. Test the power supply system to ensure proper voltage and continuity.
  4. Replace the linear solenoid if it is found to be faulty, and repair or replace any damaged wiring or connectors.
  5. Clear the DTCs from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix C120C 2017 Toyota RAV4

The typical repair costs for addressing a Linear Solenoid Power Supply System Malfunction can vary depending on the extent of the damage and the specific parts that need to be replaced. In general, the cost of parts for a new linear solenoid can range from $100 to $300, while labor costs can range from $200 to $500. Overall, the total repair cost for this issue could range from $300 to $800. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and labor rates at the auto repair shop. It's recommended to obtain a detailed quote from a trusted mechanic before proceeding with the repair.

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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.

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