Turbocharger/Supercharger Bypass Valve Control Circuit Low
â–¶ How to fix
Check dump control valve solenoid V189 and/or V190 for short circuit to ground.
What you'll see
No driver-visible symptom recorded.
System reaction
Dump valves can dump as soon as pressure in inlet manifold is below 0, 7 Bar. Could lead to bad drivability at part load.
Diagnostic depth
Detection
Fault is detected only when engine is running.
Possible cause
Check dump control valve solenoid for short circuit to ground.