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 CURRENT DTC
1. Turn ignition switch ON.
2. Connect CONSULT and check "ENGINE" diagnostic trouble codes for DTC P218F-00 being current.
Is applicable DTC current?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .
CHECK DEF QUALITY
1. Using CONSULT erase "ENGINE" diagnostic trouble codes.
2. Inspect the DEF in the tank for signs of debris or contamination.
3. Using a refractometer [SST: J-54466] measure the concentration of the DEF in the tank.
Is DEF concentration within 32.5 A± 1.5 %?

YES

GO TO 3 .

NO

Drain the DEF tank, rinse with water, and refill with pure DEF.
PERFORM DEF DOSING UNIT OVERRIDE TEST
1. Turn ignition switch OFF.
2. Remove the after treatment DEF dosing valve from the decomposition tube.
3. Place the DEF dosing valve in a measuring container having greater than a 1.5 liter [50 oz] capacity.
4. Turn ignition switch ON.
5. Using CONSULT, access "ENGINE" and select "DEF Dosing Unit Override Test" active test.
Did the DEF dosing unit operate according to specifications?

YES

GO TO 4 .

NO

Replace the DEF supply pump assembly. Refer to Exploded View .
CHECK DEF DOSING VALVE FOR PROPER OPERATION
Using CONSULT, access "ENGINE" and select "DEF Dosing Unit Leak Test" active test.

DEF leaking from the DEF dosing valve during the system leak test?

YES

A leaking after treatment DEF dosing valve has been detected. Replace the after treatment DEF dosing valve. Refer to Removal and Installation .

NO

GO TO 5 .
ERASE DTC
1. Connect all components.
2. With CONSULT, erase all DTCs.
3. Operate the engine within the conditions for setting DTC.
4. Check for existing "ENGINE" diagnostic trouble codes.
Did the P218F-00 DTC return?

YES

Troubleshooting procedure needs to be repeated. Go to DTC Description .

NO

Repair complete.