C120C Lexus 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 Lexus 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 Lexus Description
What are the Possible Causes of the DTC C120C Lexus?
- 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 Lexus?
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 Lexus 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 Lexus code?
Need more information on how to fix the C120C Lexus code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C120C Lexus code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about C120C Lexus Code
1. What does the OBDII code C120C mean on a Lexus?
C120C indicates a "Linear Solenoid Power Supply System Malfunction," which typically relates to an issue with the power supply circuit for the solenoids in the vehicle's braking or stability control systems.
2. What are the common symptoms of a C120C code in a Lexus?
Symptoms may include an illuminated ABS or traction control warning light, reduced braking performance, and potential loss of stability control functions.
3. What causes the C120C code to appear on a Lexus?
The code can be triggered by a faulty solenoid, damaged wiring or connectors in the power supply circuit, a malfunctioning ABS control module, or a blown fuse related to the braking system.
4. Can I drive my Lexus with a C120C code active?
While the car may still be drivable, the ABS and stability control systems may not function properly, increasing the risk of skidding or losing control in slippery conditions. It’s best to address the issue promptly.
5. How is the C120C code diagnosed on a Lexus?
A technician will use a scan tool to retrieve the code, inspect the wiring and connectors for damage, test the solenoid power supply, and check the ABS control module for faults.
6. What repairs are needed to fix a C120C code?
Repairs may involve replacing a faulty solenoid, repairing or replacing damaged wiring, cleaning or securing electrical connectors, or replacing the ABS control module if it’s defective.
7. How much does it cost to fix a C120C code on a Lexus?
Costs can range from $100 to $1,000 or more, depending on whether the issue is a simple wiring repair or requires replacement of expensive components like the ABS control module.
8. Can a low battery cause the C120C code on a Lexus?
Yes, a weak or failing battery can sometimes cause voltage-related issues, potentially triggering this code. Ensure the battery and charging system are in good condition.
9. Is the C120C code specific to Lexus vehicles?
While C120C is common in Lexus models, similar codes may appear in other vehicles with advanced braking systems. Always reference the specific manufacturer's documentation.
10. How can I prevent the C120C code from reoccurring in my Lexus?
Regular maintenance, such as inspecting wiring and connectors for wear, ensuring proper battery health, and addressing warning lights promptly, can help prevent this issue.
Discuss the causes and fixes for C120C Lexus OBDII Code
Code C120C Lexus comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
