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 SCR temperature sensor module reported an internal error.

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P1624-00	SCR Temperature Sensor Module Performance (Aftertreatment SCR temperature sensor module - bad intelligence device or component)	1	Diagnosis condition	Continuously when key is ON, or engine is running
			Signal (terminal)	CAN2 communication lines (18 and 35)
			Threshold	SCR Temperature Sensor Module cold junction temperature < -55°C
			Diagnosis delay time	Diagnostic runs continuously when the engine is running
		2	Diagnosis condition	Continuously when key is ON, or engine is running
			Signal (terminal)	CAN2 communication lines (18 and 35)
			Threshold	SCR Temperature Sensor Module cold junction temperature > 20°C
			Diagnosis delay time	Diagnostic runs continuously when the engine is running
		3	Diagnosis condition	Continuously when key is ON, or engine is running
			Signal (terminal)	CAN2 communication lines (18 and 35)
			Threshold	SCR Temperature Sensor Module cold junction temperature < 180°C
			Diagnosis delay time	Diagnostic runs continuously when the engine is running
		4	Diagnosis condition	Continuously when key is ON, or engine is running
			Signal (terminal)	CAN2 communication lines (18 and 35)
			Threshold	Mismatched or invalid CRC of the SCR Temperature Sensor Module ASIC's internal memory at power up
			Diagnosis delay time	Diagnostic runs continuously when the engine is running
		5	Diagnosis condition	Continuously when key is ON, or engine is running
			Signal (terminal)	CAN2 communication lines (18 and 35)
			Threshold	SCR Temperature Sensor Module's parameter storage within nonvolatile memory does not match the corresponding parameters volatile storage at power up
			Diagnosis delay time	Diagnostic runs continuously when the engine is running