Turbocharger/Supercharger Bypass Valve Control Circuit Range/Performance
â–¶ How to fix
Check dump control valve solenoid V189 and/or V190 for short circuit or open circuit Check wiring and connectors Replace dump control valve control valve
What you'll see
No driver-visible symptom recorded.
System reaction
Not possible to dump pressure when closing throttle. Can lead to bad air mass estimation at tip outs. Compressor could go into surge.
Diagnostic depth
Detection
Fault is detected only when engine is running.
Possible cause
Dump control valve solenoid V189 and/or V190: short circuit or open circuit.