DTC P253F:00 [PCM (SKYACTIV-D 2.2)]

id0102j5154400

DTC P253F:00	Engine oil system: Engine oil deterioration
DETECTION CONDITION	•  When any of the following conditions is met. Note •  The PCM determines that the engine oil has deteriorated due to an engine oil pressure decrease. Dilution of the oil from fuel becoming mixed in can be considered a cause of the engine oil pressure decrease. ―  With the following conditions met, the engine oil pressure decreases 60 kPa or more compared to when the engine oil was replaced. •  Engine speed: 1,475—1,525 rpm •  Engine oil temperature: 87—88 °C Diagnostic support note •  This is a continuous monitor (other). •  The check engine light does not illuminate. •  FREEZE FRAME DATA/Snapshot data is available. •  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	•  Not applicable
POSSIBLE CAUSE	•  Engine oil pressure sensor malfunction •  Engine oil temperature sensor malfunction •  Frequent, automatic diesel particulate filter regeneration control is performed and engine oil is diluted •  The engine oil data reset was not performed after the engine oil replacement. •  Oil viscosity lowered due to engine oil deterioration •  PCM malfunction
SYSTEM WIRING DIAGRAM	Not applicable

Diagnostic Procedure

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION Note •  Recording can be facilitated using the screen capture function of the PC. •  Record the freeze frame data/snap shot data.	—	Go to the next step.
2	VERIFY OTHER RELATED DTCs •  Switch the ignition OFF, and then switch it ON (engine off). •  Display the DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) •  Has any DTC other than P253F:00 been stored?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
		No	Go to the next step.
3	INSPECT ENGINE OIL PRESSURE SENSOR •  Inspect the engine oil pressure sensor. (See ENGINE OIL PRESSURE SENSOR INSPECTION [SKYACTIV-D 2.2].) •  Is the engine oil pressure sensor normal?	Yes	Go to the next step.
		No	Replace the engine oil pressure sensor, then go to Step 6. (See ENGINE OIL TEMPERATURE SENSOR/ENGINE OIL PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
4	INSPECT ENGINE OIL TEMPERATURE SENSOR •  Inspect the engine oil temperature sensor. (See ENGINE OIL TEMPERATURE SENSOR INSPECTION [SKYACTIV-D 2.2].) •  Is the engine oil temperature sensor normal?	Yes	Go to the next step.
		No	Replace the engine oil temperature sensor, then go to Step 6. (See ENGINE OIL TEMPERATURE SENSOR/ENGINE OIL PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
5	REPLACE ENGINE OIL •  Replace the engine oil. (See ENGINE OIL REPLACEMENT [SKYACTIV-D 2.2].)	—	Implement the engine oil data reset procedure. (See ENGINE OIL DATA RESET [SKYACTIV-D 2.2].) Go to the next step.
6	VERIFY THAT REPAIRS HAVE BEEN COMPLETED •  Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC. (See CLEARING DTC [PCM (SKYACTIV-D 2.2)].) •  Start the engine and drive the vehicle under the freeze frame data/snapshot data condition. Warning •  To prevent an accident, work with another person when the vehicle is being driven (one person drives vehicle, other person operates M-MDS). •  Observe legal speed limits when driving the vehicle and perform the procedure in a location where safety can be assured. •  Display the DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) •  Has DTC P253F:00 been recorded?	Yes	Repeat the inspection from Step 1. •  If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
		No	Go to the next step.
7	VERIFY OTHER DTCs •  Has any other DTC or pending code been stored?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
		No	DTC troubleshooting completed.