C0171

TCS Pilot Valve Circuit Malfunction

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

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

C0161 C0172 C0173