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Home >> Ford >> 2012 >> Explorer Base, 3.5 8, AWD, 6F50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Controls - Symptom Charts (Diesel)) >> No Diagnostic Trouble Codes (DTCS) Present Symptom Charts >> Chart 15

Chart 15

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NOTE: Regeneration is interrupted if the transmission is shifted into PARK or NEUTRAL position. If a regeneration event did not complete because the vehicle was shifted into the PARK or NEUTRAL position, regeneration may continue in a subsequent drive cycle. When the distance traveled between completed regenerations is greater than 1073 km (667 mi), during each subsequent drive cycle, the PCM continues to initiate the regeneration until the regeneration event completes. After the regeneration event is completed the filter is sufficiently cleaned and continues to trap the particulate matter. An internally damaged particulate filter may result in a greater than normal distance traveled value since the last completed regeneration.

Carry out the following preliminary checks:

SYSTEM OR COMPONENT REFERENCE (Section 5 Pinpoint Test unless noted)
Exhaust Restriction Visual. INSPECT the exhaust system for obstructions or restrictions. REPAIR as necessary.
Fuel Quality REFER to DIAGNOSTIC PROCEDURES , Sufficient Clean Fuel.
Power Balance CARRY OUT the Power Balance test on the scan tool. REFER to the scan tool for directions.
Turbocharger GO to PINPOINT TEST KA .
Exhaust Gas Recirculation (EGR) System GO to PINPOINT TEST W .
Exhaust Pressure (EP) Sensor GO to PINPOINT TEST X .
Mass Airflow (MAF) Sensor GO to PINPOINT TEST J .
Engine Compression REFER to the appropriate Engine - 6.7L Diesel article, General Procedures, Compression Test.
Check The Turbocharger For Internal Oil Leaks REFER to the appropriate Fuel Charging and Controls article - Turbocharger - Symptom Chart, Excessive oil consumption.
Verify The Distance Traveled Since Last Fully Completed Regeneration ACCESS and MONITOR the DIST_REGEN_C PID. MONITOR this PID to determine the distance traveled since a regeneration event was completed. This parameter resets to zero each time a regeneration event completes. If the regeneration event is interrupted, the PID continues to increment from the value stored at the time the regeneration event was initiated. This PID will remain at a locked value during the regeneration process. The EXHAUST FILTER DRIVE COMPLETE message may display when the regeneration event completes. For a detailed description, REFER to Section 1, Powertrain Control Software, Diesel Particulate Regeneration. GO to PINPOINT TEST RB