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 FOR OTHER PRIORITY DTCS
Using CONSULT, check ENGINE diagnostic trouble codes for the following higher priority DTCs:
- U029D-00
- U029E-00
- U059E-00
- U059F-00
- P1C55 - 00
- P207F-00
- P2201 - 00
- P2202 - 00
- P2209 - 00
- P220A-00
- P220B-00
- P229E-00
- P229F-00
- P22A7 - 00
Are there any of the above DTCs current?

YES

Refer to the appropriate diagnosis procedure. Refer to DTC Index .

NO

GO TO 2 .
CHECK AFTER TREATMENT DEF CONCENTRATION
Using a refractometer [SST: J-54466] measure the concentration of the DEF in the tank.

Is DEF concentration within 32.5 % ± 1.5%?

YES
- Refill the DEF fluid tank completely.
- GO TO 3 .
NO

Drain the DEF fluid tank and fill completely with new DEF..
CHECK FOR CURRENT DTC
1. Using CONSULT, erase "ENGINE" diagnostic trouble codes.
2. Turn ignition switch ON for 15 minutes.
3. Connect CONSULT, check for current "ENGINE" diagnostic trouble codes.
Is P2BA9 DTC current?

YES

Replace the After treatment DEF quality sensor. Refer to Exploded View .

NO

Repair complete.