AutoCodes – Infiniti – C1148 Infiniti

C1148 Infiniti Code - Switch-Over Solenoid Valve Line USV

Quick Answer

VDC Switch-Over Solenoid Valve (USV) (Cut Valve): The cut valve shuts off the normal brake fluid path from the master cylinder when VDC/TCS is activated. Common causes include Faulty ABS Actuator And Electric Unit, ABS Actuator And Electric Unit harness is open or shorted, ABS Actuator And Electric Unit 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: C1148 Infiniti indicates Switch-Over Solenoid Valve Line USV.
Common causes: Common causes include Faulty ABS Actuator And Electric Unit, ABS Actuator And Electric Unit harness is open or shorted, ABS Actuator And Electric Unit 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 1,371

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 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1148 Infiniti Description

VDC Switch-Over Solenoid Valve (USV) (Cut Valve): The cut valve shuts off the normal brake fluid path from the master cylinder when VDC/TCS is activated. The VDC Switch-Over Solenoid Valve (HSV) (Suction Valve): The suction valve supplies the brake fluid from the master cylinder to the pump, when VDC/TCS is activated. The Anti-Lock Brake System (ABS) Actuator And Electric Unit (Control Unit) monitors the Switch-Over Solenoid. The ABS Actuator And Electric Unit set the OBDII code when the Switch-Over Solenoid is not to factory specifications.

OBDII Code C1148 Infiniti - Switch-Over Solenoid Valve Line USV - AutoCodes.com — C1148 Infiniti Code - Switch-Over Solenoid Valve Line USV

What does this mean?

What are the Possible Causes of the DTC C1148 Infiniti?

Faulty ABS Actuator And Electric Unit
ABS Actuator And Electric Unit harness is open or shorted
ABS Actuator And Electric Unit circuit poor electrical connection

How to Fix the DTC C1148 Infiniti?

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 C1148 Infiniti 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 C1148 Infiniti 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 C1148 Infiniti Code

1. What does the OBDII code C1148 mean on an Infiniti?

C1148 indicates a fault in the Switch-Over Solenoid Valve Line (USV), which is part of the vehicle's anti-lock braking system (ABS) or traction control system.

2. What are the common symptoms of the C1148 code in an Infiniti?

Symptoms may include the ABS warning light or traction control light illuminated, reduced braking performance, or loss of traction control functionality.

3. What causes the C1148 code to appear?

Common causes include a malfunctioning switch-over solenoid valve, damaged wiring or connectors in the valve circuit, or a failed ABS module.

4. Can I drive my Infiniti with the C1148 code active?

While the vehicle may still be drivable, safety systems like ABS and traction control may not function properly, increasing the risk of skidding or reduced braking performance.

5. How can I diagnose the C1148 code on my Infiniti?

Start by inspecting the wiring and connectors for damage or corrosion. Use a multimeter to test the solenoid valve circuit and verify proper operation of the ABS module.

6. What repairs are needed to fix the C1148 code?

Repairs may include replacing the switch-over solenoid valve, repairing or replacing damaged wiring or connectors, or replacing the ABS module if it is faulty.

7. How much does it cost to repair the C1148 code on an Infiniti?

Repair costs vary but typically range from $150 to $500, depending on whether the solenoid valve, wiring, or ABS module requires replacement.

8. Can a faulty ABS sensor cause the C1148 code?

No, the C1148 code specifically points to an issue with the switch-over solenoid valve line and is unrelated to the wheel speed sensors.

9. How do I prevent the C1148 code from occurring again?

Regular maintenance, inspecting wiring and connectors for wear, and addressing ABS-related issues promptly can help prevent this code from recurring.

10. Do I need specialized tools to fix the C1148 code?

Yes, diagnosing and repairing the issue may require an OBDII scanner capable of reading ABS codes, a multimeter for electrical testing, and possibly replacement tools for the solenoid valve.