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Engine Diagnostic Trouble Code (DTC) Definition

OBD-II DTC IDENTIFICATION CHART

DTC SSM Title (1) Circuit Affected
P0100  QA Mass Airflow Sensor Circuit
P0101  QA_R Mass Airflow Sensor Circuit Range/Performance Problem
P0105  P_S Pressure Sensor Circuit Malfunction
P0106  PS_R Pressure Sensor Range/Performance
P0115  TW Engine Coolant Temperature Sensor Circuit Malfunction
P0120  THV Throttle Position (TP) Sensor Circuit Malfunction
P0121  TH_R Throttle Position (TP) Sensor Range/Performance
P0125  TW_CL Engine Coolant Temperature Too Low For Closed Loop Control
P0130  FO2_V Front O2S Circuit Malfunction
P0133  FO2_R Front O2S Circuit Slow Response
P0135  FO2H Front O2S Heater Circuit Malfunction
P0136  RO2_V Rear O2S Circuit Malfunction
P0139  RO2_R Rear O2S Circuit Slow Response
P0141  RO2H Rear O2S Heater Circuit Malfunction
P0170  FUEL Fuel Trim Malfunction
DTC P1080 - FUEL TEMPERATURE SENSOR A CIRCUIT MALFUNCTION (TNKT)  FUEL Fuel Temperature Sensor Circuit A Malfunction (TNKT)
P0201  INJ1 Fuel Injector No. 1
P0202  INJ2 Fuel Injector No. 2
P0203  INJ3 Fuel Injector No. 3
P0204  INJ4 Fuel Injector No. 4
P0301  MIS_1 Cylinder No. 1 Misfire Detected
P0302  MIS_2 Cylinder No. 2 Misfire Detected
P0303  MIS_3 Cylinder No. 3 Misfire Detected
P0304  MIS_4 Cylinder No. 4 Misfire Detected
P0325  KNOCK Knock Sensor (KS) Circuit Malfunction
P0335  CRANK Crankshaft Position (CKP) Sensor
P0340  CAM Camshaft Position (CMP) Sensor
P0400  EGR EGR Flow
P0403  EGRSOL EGR Circuit
P0420  CAT CAT Efficiency Below Threshold
P0440  EVAP EVAP Emission Control System
P0441  CPC_F Incorrect EVAP Purge Flow
P0443  EVAP EVAP Circuit Malfunction
P0500  VSP Vehicle Speed Sensor (VSS)
P0505  ISC Idle Control System
P0506  ISC_L Idle RPM Too Low
P0507  ISC_H Idle RPM Too High
P0600  - Serial Communication Link Malfunction
P0601  RAM Memory Check Error
P0703 (2) ATBRK Brake Switch Input Malfunction
P0705 (2) ATRNG Transmission Range Sensor Circuit Malfunction
P0710 (2) ATF Transmission Fluid Temperature Sensor Circuit Malfunction
P0720 (2) ATVSP Output Speed Sensor (VSS No. 1) Circuit Malfunction
P0725 (2) ATNE Engine Speed Input Circuit Malfunction
P0731 (2) ATGR1 Gear 1 Incorrect Ratio
P0732 (2) ATGR2 Gear 2 Incorrect Ratio
P0733 (2) ATGR3 Gear 3 Incorrect Ratio
P0734 (2) ATGR4 Gear 4 Incorrect Ratio
P0740 (2) ATLU_F Torque Converter Clutch System Malfunction
P0743 (2) ATLU Torque Converter Clutch System Circuit
P0748 (2) ATPL Pressure Control Solenoid Circuit
P0753 (2) ATSFT1 Shift Solenoid "A" Circuit
P0758 (2) ATSFT2 Shift Solenoid "B" Circuit
P0760 (2) ATOVR_F Shift Solenoid "C" Malfunction
P0763 (2) ATOVR Shift Solenoid "C" Circuit
P1100  ST_SW Starter Switch Circuit Malfunction
P1101  N/P_SW Neutral Position Switch Circuit Problem (A/T)
P1101  N/P_SW Neutral Position Switch Circuit Problem (M/T)
P1102 (2) BR Pressure Sources Switching Solenoid Valve Circuit Malfunction
P1103 (2) TRQ Engine Torque Control Signal Circuit Malfunction
P1104 (2) TCS TCS Signal Circuit Malfunction
P1107 (3) BR2 Air Injection System Diagnosis Solenoid Circuit Malfunction
P1500 FAN_1 Cooling Fan No. 1 Circuit Malfunction
P1502  FAN_F Cooling Fan Function Problem
P1700  ATTH TP Sensor Circuit Malfunction (A/T)
P1701 (2) ATCRS Cruise Control Set Signal Circuit Malfunction (A/T)
P1702 (2) ATDIAG A/T Diagnosis Input Signal Circuit Malfunction
(1) When using Subaru Select Monitor (SSM).
(2) Covered in entirety in appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.
(3) A/T models only.