Diagnosis Procedure
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.
- CHECK DTC PRIORITY
- Turn ignition switch ON.
- Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
- Check for DTC P1627-00 being current on the CONSULT screen.
Is applicable DTC detected?
YES
GO TO 2 .
NO
Refer to Intermittent Incident .
- CHECK THE SCR TEMPERATURE SENSOR MODULE INSTALLATION
- Turn ignition switch OFF.
- Verify that the SCR temperature sensor module is properly mounted and the proper heat shield is mounted over it.
Are the SCR temperature sensor module and heat shield properly installed?
YES
GO TO 3 .
NO
Properly install the SCR temperature sensor module and heat shield. Refer to Exploded View .
- CHECK FOR OBSTRUCTED OR RESTRICTED AIR FLOW TO THE SCR TEMPERATURE SENSOR MODULE
Check the SCR temperature sensor module mounting area for air flow obstructions:
- Debris on or around the temperature sensor module.
- Aftermarket shields, flaps, or brackets mounted too close to the module.
- Exhaust leaks allowing exhaust to overheat the temperature sensor module.
Are there any signs of air flow restriction or excessive heat around the DPF temperature sensor module?
YES
Repair the cause of the restricted air flow. Remove any debris accumulated near the SCR temperature sensor module. Relocate any aftermarket accessories that might be restricting air flow.
NO
Check for proper installation of the SCR temperature sensor module. Refer to Exploded View .