Turbocharger/Supercharger Bypass Valve Control Circuit
â–¶ How to fix
Check dump control valve solenoid V189 and/or V190 for short circuit or open circuit.
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 which will lead to jerks. Compressor could go into surge with a increased level of noise when trying to dump pressure.
Diagnostic depth
Detection
Fault is detected only when engine is running.
Possible cause
Dump control valve solenoids: short circuit or open circuit.