C0166

TCS Priming Line Valve Circuit Malfunction

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

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

C0165 C0167 P0455