Diesel Exhaust Fluid Usage - Abnormal

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.

Symptom	Possible Cause	Action	Reference
Diesel Exhaust Fluid Usage - Abnormal	Active DTC's or high counts of inactive DTC's	Check for active and inactive DTC's.	Work Flow
	Aftertreatment diesel exhaust fluid (DEF) leak (external)	Inspect for external after treatment DEF leaks near the after treatment DEF tank, after treatment DEF lines, and associated connections. Repair or replace parts as necessary.	Exhaust Schematic
	Aftertreatment diesel exhaust fluid (DEF) low level or warning level not set correctly	Verify the settings for the DEF low level warning are correct.	System Description
	Engine control module (ECM) is malfunctioning	Using CONSULT confirm ECM has the latest software revision.	Work Flow
	Aftertreatment diesel exhaust fluid (DEF) level gauge is inaccurate	Verify that the after treatment DEF level gauge is correctly calibrated and matched to the DEF tank.	System Description