Diagnosis Procedure

1. Turn ignition switch ON.
2. Connect CONSULT and check for existing "ENGINE" diagnostic trouble codes.
3. Check for DTC P202E-00 being current on the CONSULT screen.

Is applicable DTC current?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .

1. Turn ignition switch OFF.
2. Remove the DEF dosing valve.
3. Check for an adequate amount of DEF in the DEF tank prior to starting this test.
4. Place the dosing valve in a plastic container capable of measuring from 0 to 500 ml (0 to 17 oz) in 5 ml (0.34 oz) increments.
   WARNING: To reduce the risk of personal injury, do not get Diesel exhaust fluid (DEF) in your eyes as it contains urea. In case of contact, immediately flush eyes with large amounts of water for a minimum of 15 minutes. Do not swallow. In the event DEF is ingested, contact a physician immediately. Reference the Safety Data Sheet (SDS) for additional information.
   NOTE: When the test begins, briefly monitor the spray pattern of the DEF exiting the aftertreatment DEF dosing valve. Check for the following:

   • Signs of larger drops and/or dripping DEF from the tip.
   • Spray pattern that is not symmetrical (sprays more to one side).
5. Turn ignition switch ON.
6. Connect CONSULT and perform "DEF Dosing Unit Override Test" under "ENGINE" which will run for 6 minutes.

Did the DEF dosing valve pump between 85 mm (2.9 in) and 115 mm (3.9 in) in a uniform spray pattern?

YES

GO TO 3 .

NO

Replace the DEF dosing valve. Refer to Exploded View .

1. Turn ignition switch OFF.
2. Reconnect the DEF dosing valve.
3. Turn ignition switch ON.
4. With CONSULT erase "ENGINE" diagnostic trouble codes.
5. Operate the engine within the "Conditions for Clearing the DTC" found in the DTC description.

Is P202E-00 DTC current?

YES

Return to the diagnosis procedure steps if all steps have been completed and checked again. Refer to DTC Description .

NO

Repair complete.