P0254 is set when excessive current in power circuit of Fuel pressure regulator valve(Fuel Metering Unit)(integrated with high pressure pump) is detected for more than 0.22 sec. This code is due to short to battery in power circuit or Fuel pressure regulator valve(Fuel Metering Unit) internal short.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy |
•
Voltage monitoring |
•
Fuel pressure regulator valve(Fuel Metering Unit) circuit
•
Fuel pressure regulator valve(Fuel Metering Unit) component | ||
Enable Conditions |
•
IG KEY "ON" | |||
Threshold Value |
•
Short to battery (power circuit in Fuel pressure regulator valve(Fuel Metering Unit)) | |||
Diagnostic Time |
•
220ms | |||
Fail Safe | Fuel cut | NO | ||
EGR Off | NO | |||
Fuel Limit | YES | |||
Check Lamp | YES | |||
