TCS Priming Line Valve Circuit Malfunction


Table of contents

C0166 SATURN Possible Causes

  • Faulty TCS Prime Valve Solenoid
  • TCS Prime Valve Solenoid harness is open or shorted
  • TCS Prime Valve Solenoid circuit poor electrical connection

How do I fix code C0166 SATURN?

  Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.

Cost of diagnosing the C0166 SATURN code

  The cost of diagnosing the C0166 SATURN code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

C0166 SATURN Description

  The Master Cylinder Isolation Valve, or TCS Prime Valve Solenoid circuits are supplied with battery power when the ignition is in the RUN position. The Electronic Brake Control Module (EBCM) controls the valve functions by grounding the circuit when necessary.

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