AutoCodes – Mitsubishi – C120C Mitsubishi

C120C Mitsubishi Code - Abnormality In FR/RL Wheel Suction Valve System

Quick Answer

The Anti-Lock Brake System (ABS) Electronic Control Unit (ECU) the power supply circuit for the solenoid valve. Common causes include Faulty Anti-Lock Brake System (ABS) Electronic Control Unit (ECU), ABS-ECU harness is open or shorted, ABS-ECU 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 Mitsubishi indicates Abnormality In FR/RL Wheel Suction Valve System.
Common causes: Common causes include Faulty Anti-Lock Brake System (ABS) Electronic Control Unit (ECU), ABS-ECU harness is open or shorted, ABS-ECU 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 1,223

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Aug 25, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C120C Mitsubishi Description

The Anti-Lock Brake System (ABS) Electronic Control Unit (ECU) the power supply circuit for the solenoid valve. The solenoid valve is energized by the valve relay, which is incorporated in ABS-ECU. The valve relay, which is incorporated in ABS-ECU, is always energizing the solenoid valve unless the initial check is in progress when the ignition switch is turned on, or the recurrent system check is in progress. ABS-ECU activates the solenoid valve by turning on its driving transistor.

OBDII Code C120C Mitsubishi - Abnormality In FR/RL Wheel Suction Valve System - AutoCodes.com — C120C Mitsubishi Code - Abnormality In FR/RL Wheel Suction Valve System

What does this mean?

What are the Possible Causes of the DTC C120C Mitsubishi?

Faulty Anti-Lock Brake System (ABS) Electronic Control Unit (ECU)
ABS-ECU harness is open or shorted
ABS-ECU circuit poor electrical connection

How to Fix the DTC C120C Mitsubishi?

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 Mitsubishi 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 Mitsubishi code?

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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 Mitsubishi Code

1. What does the OBDII code C120C mean on a Mitsubishi?

C120C refers to an "Abnormality in FR/RL Wheel Suction Valve System," indicating a potential issue with the hydraulic brake control system related to the front right (FR) and rear left (RL) wheel valves.

2. What are the common symptoms of code C120C on a Mitsubishi?

Common symptoms include the ABS warning light illuminating, reduced braking performance, and potential loss of ABS functionality.

3. What causes the C120C code to appear?

This code is typically caused by a malfunctioning ABS hydraulic control unit, faulty wheel speed sensors, damaged wiring, or a failure in the suction valve system.

4. Can a faulty wheel speed sensor trigger code C120C?

Yes, a faulty wheel speed sensor can contribute to this code if it interferes with the hydraulic control system's ability to regulate wheel braking pressure.

5. How is the C120C code diagnosed?

Diagnosis usually involves scanning for stored codes, inspecting the ABS hydraulic unit, checking wheel speed sensors, and testing the wiring and connectors for continuity or damage.

6. Can I continue driving with the C120C code active?

While the vehicle may still be drivable, you should address the issue promptly as it can affect ABS functionality and overall braking performance, posing a safety risk.

7. What repairs are commonly needed to fix the C120C code?

Repairs may include replacing the ABS hydraulic control unit, repairing or replacing wiring, or addressing issues with the suction valve or wheel speed sensors.

8. How much does it cost to fix a C120C code on a Mitsubishi?

Repair costs vary depending on the root cause, but replacing an ABS hydraulic control unit can cost between $500 and $1,500, while simpler fixes like sensor replacement may cost less.

9. Can clearing the C120C code with a scanner fix the issue?

Clearing the code may temporarily turn off the warning light, but the underlying issue must be repaired to prevent the code from returning.

10. Is the C120C code specific to Mitsubishi vehicles?

While the code format is part of the OBDII system, the specific definition and application of C120C as "Abnormality in FR/RL Wheel Suction Valve System" is specific to Mitsubishi.