DTC P0A0F:00 [PCM (SKYACTIV-D 2.2)]

id0102j5950400

DTC P0A0F:00	Engine failed to restart
DETECTION CONDITION	•  When any of the following conditions is met: ―  When the engine should restart after it is stopped by the i-stop control, it does not start even though it is cranked for 3 s or more. ―  Engine does not crank when the engine is stopped and started by the i-stop control. 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	•  Inhibits engine-stop by i-stop control.
POSSIBLE CAUSE	•  Related parts malfunction ―  Starter relay malfunction ―  Battery malfunction ―  Malfunction in wiring harness between starter relay and PCM, or poor connector contact ―  Starter malfunction •  Common rail system malfunction •  Piston stop position malfunction during idling stop ―  CKP sensor signal error ―  Intake air system related malfunction (air suction, vacuum hose breakage) ―  EGR control malfunction ―  Engine starting system malfunction •  Mechanical (engine) malfunction ―  Valve timing inappropriate •  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 or on). •  Display the DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)]) •  Has DTC P057F:00 been recorded?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC P057F:00 [PCM (SKYACTIV-D 2.2)])
		No	Go to the next step.
3	VERIFY IF MALFUNCTION CAUSED BY INABILITY TO START ENGINE •  Start the engine. •  Does it start normally?	Yes	Go to the next step.
		No	Perform symptom troubleshooting according to [NO. 9 POOR ENGINE STARTING (ENGINE DOES NOT START)] or [NO. 10 POOR ENGINE STARTING (ENGINE STARTING DIFFICULT)]. (See NO.9 WILL NOT CRANK [SKYACTIV-D 2.2]) (See NO.10 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [SKYACTIV-D 2.2])
4	VERIFY COMMON RAIL SYSTEM OPERATION •  Inspect the common rail operation. (See COMMON RAIL INSPECTION [SKYACTIV-D 2.2]) •  Does the common rail operate normally?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location, then go to Step 11. (See COMMON RAIL REMOVAL/INSTALLATION [SKYACTIV-D 2.2])
5	DETERMINE IF MALFUNCTION IS CAUSED BY ROUGH IDLING OR PISTON-STOP POSITION MALFUNCTION •  Start the engine and warm it up. •  Is the idle speed stabilized?	Yes	Go to the next step.
		No	Go to Step 7.
6	INSPECT CKP SENSOR SIGNAL •  Display the PCM terminal 1E output signal wave pattern using an oscilloscope. (See PCM INSPECTION [SKYACTIV-D 2.2]) •  Is the output wave pattern normal?	Yes	Go to Step 11.
		No	Inspect the CKP sensor pulse wheel •  If there is a malfunction ―  Replace the pulse wheel. •  If there is no malfunction ―  Replace the CKP sensor. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2]) Go to Step 11.
7	VERIFY VACUUM HOSE CONNECTION STATUS •  Verify the vacuum hose connection status. •  Is the vacuum hose connection status normal?	Yes	Go to the next step.
		No	Correctly connect the vacuum hose, then go to Step 11.
8	INSPECT INTAKE AIR SYSTEM FOR AIR SUCTION •  Visually inspect the following intake air system for looseness or damage. ―  Air cleaner to intake manifold •  Is the intake air system normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location, then go to Step 11.
9	VERIFY EGR VALVE OPERATION CONDITION •  Perform the EGR control inspection. (See EGR VALVE INSPECTION [SKYACTIV-D 2.2]) •  Is the EGR valve operation normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location, then go to Step 11. (See EGR VALVE REMOVAL/INSTALLATION [SKYACTIV-D 2.2])
10	VERIFY ASSEMBLY CONDITION OF TIMING CHAIN •  Verify the condition of the timing chain assembly (valve timing, looseness, jumping). (See TIMING CHAIN REMOVAL/INSTALLATION [SKYACTIV-D 2.2]) •  Is the timing chain condition normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location. Assemble the timing chain using the correct timing, then go to Step 11. (See TIMING CHAIN REMOVAL/INSTALLATION [SKYACTIV-D 2.2])
11	VERIFY THAT REPAIRS HAVE BEEN COMPLETED •  Reconnect all disconnected connectors and hoses. •  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 (mode 2)/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 P0A0F: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.
12	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.