Test Procedure

WARNING: This page is about a different car, the 2020 Ford F-550 Super Duty, 2020 Ford F-450 Super Duty, 2020 Ford F-350 Super Duty, 2020 Ford F-250 Super Duty, and 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

AB1 CHECK THE ENGINE OIL LEVEL

Check that the engine oil level is correct.

Is the engine oil level correct?

Yes	No
RETURN to SYMPTOM CHARTS for further direction.	GO to AB2.

AB2 CHECK THE ENGINE OIL MAINTENANCE INTERVALS

Check the maintenance records for engine idle time, mileage and vehicle usage since the last engine oil change. Refer to the lube oil chart in the Service Information or Owner's Literature for the correct engine oil selection for temperature conditions.

Is the engine oil maintenance up to date?

Yes	No
For Transit, GO to AB3. For all others, GO to AB4.	CHANGE the engine oil and oil filter.

AB3 CHECK THE DPF_LOAD_PCT PID STATE

Ignition ON, engine OFF.
Access the PCM and monitor the DPF_REGEN_PCT (PER) PID.

Is the percentage 100% or greater?

Yes	No
GO to AB4.	ADVISE the customer of the vehicle operating conditions necessary for diesel particulate filter regeneration.

AB4 CHECK FOR AFTERMARKET PERFORMANCE PRODUCTS

Check for aftermarket exhaust accessories and performance modifications.

Is a concern present?

Yes	No
RETURN the vehicle to original equipment manufacturer (OEM) components as necessary. ADVISE the customer of the conditions that cause incomplete regeneration events.	CHANGE the engine oil and oil filter. ADVISE the customer of the conditions that cause incomplete regeneration events.