C0004

TCS Control Channel B Valve 2

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

The TCS/ESP indicator on the dashboard lights up
Reduced effectiveness of the traction control system
Possible problems with braking on slippery surfaces

Causes

TCS solenoid valve malfunction
Open or short circuit in wiring harness
Problems with the TCS control unit
Contact corrosion

How to Fix

Check the integrity of the wiring harness to the valve
Check valve resistance
Check power and ground at valve connector
If necessary, replace the faulty valve

Related codes

C0001 C0002 C0003 C0005