C0171
TCS Pilot Valve Circuit Malfunction
C0171 is an OBD-II diagnostic trouble code meaning: TCS Pilot Valve Circuit Malfunction. Common causes: open or short circuit in wiring harness, tcs pilot valve malfunction. Estimated repair cost: $56–167.
Symptoms
- ABS/TCS indicator is on
- Disabling the traction control system
- Unstable operation of the system when wheels slip
Causes
- Open or short circuit in wiring harness
- TCS pilot valve malfunction
- Problems with the ABS/TCS control unit
- Corrosion or poor contact in connectors
How to Fix
- Check wiring harness and connectors for damage
- Check TCS pilot resistance
- Check power and ground in valve circuit
- Replace pilot valve or control unit if necessary
Related codes
Error C0171 by Vehicle Brand
FAQ
What does the C0171 code mean?
C0171 is an OBD-II diagnostic trouble code that indicates: TCS Pilot Valve Circuit Malfunction
What causes a C0171 error code?
The most common causes of C0171 include: Open or short circuit in wiring harness; TCS pilot valve malfunction; Problems with the ABS/TCS control unit; Corrosion or poor contact in connectors.
How do I fix a C0171 diagnostic trouble code?
To fix C0171: Check wiring harness and connectors for damage. Check TCS pilot resistance. Check power and ground in valve circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0171?
Limited driving only, diagnose soon
How much does it cost to fix C0171?
The estimated repair cost for C0171 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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