AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Generic - C1166

C1166 Code - Suction Valve 1

- Code Popularity: 1,458 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC C1166?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Anti-Lock Brake System (ABS) Actuator and Electric Unit (Control Unit)
  • ABS Actuator and Electric Unit harness is open or shorted
  • ABS Actuator and Electric Unit circuit poor electrical connection
⚠ Does your Car have Safety Recalls? → Check here

How to Fix the DTC C1166?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for C1166 Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1166 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

Front side VDC switch-over solenoid valve (suction valve 1) is open or shorted, or control line is open or shorted to power supply or ground.

What are Code Possible Symptoms?

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

Code C1166 Description

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 Suction Valve. ABS Actuator and Electric Unit sets the OBDII code when the Suction Valve is not to factory specifications.

OBDII Code C1166 - Suction Valve 1 - AutoCodes.com
C1166 Code - Suction Valve 1

Need More Information on the Code?

Need more information on how to fix the C1166 code? Get Access to Factory Service Manuals

Information for Specific Makes

Need Help with the Code?

Get the C1166 code diagnosed by a professional: Find a repair shop in your area

Code C1166 comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the C1166 code? Have you replaced any parts?
Any information is appreciated. Thanks