P25B6

Turbocharger/Supercharger Wastegate B Stuck Closed

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Reduced engine power
Turbocharger overheating
Engine knock
Excessive turbine noise
Check engine light comes on

Causes

Mechanical jamming of the bypass valve
Valve actuator malfunction
Problems with the vacuum drive (if any)
Open or short circuit in control circuit
Control unit software error

How to Fix

Check the mechanical movement of the valve
Diagnose the operation of the valve actuator
Check the integrity of the control circuit and connectors
Clean or replace a stuck valve
If necessary, replace the turbocharger assembly

Related codes

P25B5 P25B7 P2563