C0166
TCS Priming Line Valve Circuit Malfunction
C0166 is an OBD-II diagnostic trouble code meaning: TCS Priming Line Valve Circuit Malfunction. Common causes: open or short circuit in the tcs purge valve circuit, tcs purge valve malfunction. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Unstable operation of the traction control system
- Reduced braking performance on slippery surfaces
Causes
- Open or short circuit in the TCS purge valve circuit
- TCS purge valve malfunction
- Problems with the TCS control unit
- Wiring harness damage
How to Fix
- Check the continuity of the TCS purge valve circuit
- Test TCS purge valve resistance
- Check control signals from the TCS control unit
- Replace TCS purge valve if necessary
- Repair wiring damage
Related codes
Error C0166 by Vehicle Brand
FAQ
What does the C0166 code mean?
C0166 is an OBD-II diagnostic trouble code that indicates: TCS Priming Line Valve Circuit Malfunction
What causes a C0166 error code?
The most common causes of C0166 include: Open or short circuit in the TCS purge valve circuit; TCS purge valve malfunction; Problems with the TCS control unit; Wiring harness damage.
How do I fix a C0166 diagnostic trouble code?
To fix C0166: Check the continuity of the TCS purge valve circuit. Test TCS purge valve resistance. Check control signals from the TCS control unit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0166?
Limited driving only, diagnose soon
How much does it cost to fix C0166?
The estimated repair cost for C0166 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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