C120C Toyota 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 Toyota 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.
Code C120C Toyota Description
What are the Possible Causes of the DTC C120C Toyota?
- 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 Toyota?
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 Toyota 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 Toyota code?
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Need Help with the Code?
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Information for Specific Toyota Models
- C120C 2013 Toyota RAV4 — Linear Solenoid Power Supply System Malfunction
- C120C 2014 Toyota RAV4 — Linear Solenoid Power Supply System Malfunction
- C120C 2015 Toyota RAV4 — Linear Solenoid Power Supply System Malfunction
- C120C 2016 Toyota RAV4 — Linear Solenoid Power Supply System Malfunction
- C120C 2017 Toyota RAV4 — Linear Solenoid Power Supply System Malfunction
- C120C 2018 Toyota RAV4 — Linear Solenoid Power Supply System Malfunction
Frequently Asked Questions about C120C Toyota Code
1. What does the OBDII code C120C mean on a Toyota?
C120C indicates a "Linear Solenoid Power Supply System Malfunction," which relates to the vehicle's braking system, specifically an issue with the power supply to the solenoid controlling brake pressure.
2. What are common symptoms of the C120C code on a Toyota?
Symptoms may include the ABS warning light illuminating, reduced braking performance, or the vehicle's stability control system not functioning properly.
3. What causes the C120C code to appear in a Toyota?
Common causes include a faulty linear solenoid, damaged wiring or connectors in the power supply circuit, a blown fuse, or a malfunctioning ABS module.
4. Can I drive my Toyota with the C120C code active?
Driving with the C120C code may be unsafe as it can affect braking and stability systems. It is best to address the issue promptly to ensure safe operation.
5. How do I diagnose the C120C code on a Toyota?
Diagnosis involves checking the linear solenoid circuit, inspecting wiring and connectors for damage, testing the solenoid's resistance, and verifying that the ABS module is functioning correctly.
6. How is the C120C code repaired on a Toyota?
Repairs may include replacing the faulty linear solenoid, repairing or replacing damaged wiring or connectors, replacing a blown fuse, or, in some cases, replacing the ABS module.
7. What tools are needed to troubleshoot the C120C code on a Toyota?
You’ll need an OBDII scanner capable of reading ABS codes, a multimeter to test resistance and voltage, and basic tools for inspecting and repairing wiring or components.
8. How much does it cost to fix the C120C code on a Toyota?
Repair costs can vary depending on the exact cause but typically range from $100 to $500, with higher costs if the ABS module needs replacement.
9. Can a low battery cause the C120C code in a Toyota?
Yes, a weak or failing battery can cause voltage issues in the system, potentially triggering the C120C code. Ensure the battery is fully charged and in good condition.
10. Will clearing the C120C code fix the problem permanently?
No, clearing the code will only temporarily remove it from the system. The underlying issue must be diagnosed and repaired to prevent the code from returning.
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