Possible Cause
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.
- Malfunctioning DEF supply pump assembly.
- Exhaust system leaks.
- Malfunctioning SCR catalyst
- Degraded, diluted, or incorrect DEF.
- DEF deposits in the decomposition tube.