Internal leakage or unknown fault in the low pressure valve (V175).
â–¶ How to fix
Look for DTCs in the low pressure valve solenoid and railpressure sensor. Toggle U15 to reset fault code. Check that the valve is closing on command by performing I/O control. Replace low pressure valve.
What you'll see
Leakage diagnostics can not be performed correctly.
System reaction
Amber engine warning lamp
Diagnostic depth
Detection
The GSC indicates that the railpressure does not decrease if the low pressure valve is closed for a short time.
Possible cause
Low pressure valve Actuator Stuck Open Low pressure valve Component Internal Failure Sensor, rail pressure gas Component Internal Failure