DTC Detection Logic

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

The Engine Control Module (ECM) detected a short circuit to ground in the High Pressure Common Rail Fuel Pressure Relief Valve circuit signal or return circuit.

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P009C-00	(Fuel Pressure Relief Control Circuit Low)	Diagnosis condition	Ignition is turned ON and before engine speed is detected. Ignition OFF. The DTC will be active at the next ignition ON event.
		Signal (terminal)	(-)
		Threshold	PCV driver voltage < 3V
		Diagnosis delay time	Diagnostic runs continuously when the engine is running