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ENGINE CONTROL SYSTEM SYMPTOMS EC-485 < SYMPTOM DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC N P O Mass air flow sensor circuit 1 1 2 2 2 2 2 2 , Engine coolant temperature sensor circuit 3 3 3 , Air fuel ratio (A/F) sensor 1 circuit , , , , Throttle position sensor circuit 2 2 , , , , Accelerator pedal position sensor circuit 3 2 1 , , , Knock sensor circuit 2 3 Crankshaft position sensor (POS) circuit 2 2 Camshaft position sensor (PHASE) circuit 3 2 Vehicle speed signal circuit 2 3 3 3 Power steering pressure sensor circuit 2 3 3 ECM 2 2 3 3 3 3 3 3 3 3 3 , , , , , , Intake valve timing control solenoid valve cir- 3 2 1 3 2 2 3 3 Park/neutral position (PNP) signal circuit 3 3 3 3 3 Refrigerant pressure sensor circuit 2 3 3 4 Electrical load signal circuit 3 Air conditioner circuit 2 2 3 3 3 3 3 3 3 3 2 or ABS actuator and electric unit (control unit) 4 SYMPTOM Refer- HARD/NO S TA R T/RES TA R T (E XCP . HA) E N GINE ST ALL HES IT A TION/SURGING/FLA T SPOT S P ARK KNOC K /DET O NA TI ON LACK OF POWER/POOR ACCELERA TION HIG H IDL E /L OW ID LE ROUGH IDLE/HUNTING ID LING VI BRA T ION S LOW/NO RETU RN T O ID LE OVERHEA T S /W A TER TEMPERA T URE HIG H E XCESSIVE FUEL CON S UMP T ION E XCESSIVE OIL C O NSUMP T ION B A TTER Y DEAD (UNDER CHARGE) Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA |