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Engine Diagnostic Trouble Code (DTC) Definition

OBD-II DTC IDENTIFICATION CHART

DTC (1) SSM Title Circuit Affected
P0101  QA_RLOW MAF Sensor Circuit Range/Performance Problem
P0102  QA_LOW MAF Sensor Circuit Low Input
P0103  QA_HI MAF Sensor Circuit High Input
P0106  PS_R2 Pressure Sensor Range/Performance
P0107  P_SLOW Pressure Sensor Circuit Low Input
P0108  P_SHI Pressure Sensor Circuit High Input
P0116  TW_LOW ECT Sensor Circuit Low Input
P0117  TW_HI ECT Sensor Circuit High Input
P0120  THV Throttle Position (TP) Sensor Circuit Malfunction
P0121  TH_R Throttle Position (TP) Sensor Range/Performance
P0122  THV_LOW Throttle Position (TP) Sensor Circuit
P0123  THV_HI Throttle Position (TP) Sensor Circuit
P0125  TW_CL Engine Coolant Temp. 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
P0181  TNKT_F Fuel Temp. Sensor "A" Circuit Range/Performance
P0182  TNKT_LOW Fuel Temp. Sensor "A" Circuit Low Input
P0183  TNKT_HI Fuel Temp. Sensor "A" Circuit High Input
P0261  INJ1 Fuel Injector Circuit Low Input No. 1
P0262  INJ1_HI Fuel Injector Circuit High Input No. 1
P0264  INJ2 Fuel Injector Circuit Low Input No. 2
P0265  INJ2_HI Fuel Injector Circuit High Input No. 2
P0267  INJ3 Fuel Injector Circuit Low Input No. 3
P0268  INJ3_HI Fuel Injector Circuit High Input No. 3
P0270  INJ4 Fuel Injector Circuit Low Input No. 4
P0271  INJ4_HI Fuel Injector Circuit High Input 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 1 (KS) Circuit Malfunction
P0335  CRANK Crankshaft Position (CKP) Sensor Malfunction
P0336  CRANK_R Crankshaft Position Sensor Range/Performance Problem
P0340  CAM Camshaft Position (CMP) Sensor Circuit Malfunction
P0341  CAM_R Camshaft Position Sensor Range/Performance Problem
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
P0446  VCMSOL_LOW EVAP Emission Control System Vent Control Low Input
P0451  TNKP_F EVAP Pressure Sensor Range/Performance
P0452  TNKP_LOW EVAP Pressure Sensor Low Input
P0453  TNKP_HI EVAP Pressure Sensor High Input
P0461  FLVL_R Fuel Level Sensor Circuit Range/Performance Problem
P0462  FLVL_LOW Fuel Level Sensor Circuit Low Input
P0463  FLVL_HI Fuel Level Sensor Circuit High Input
P0500  VSP Vehicle Speed Sensor (VSS)
P0505  ISC Idle Control System
P0506  ISC_LOW Idle RPM Too Low
P0507  ISC_HI Idle RPM Too High
P0600  - Serial Communication Link Malfunction
P0601  RAM Memory Check Error
P0703 (2) ATBRK Brake Switch Input Malfunction
P0705 (2) ATRNG Trans. Range Sensor Circuit Malfunction
P0710 (2) ATF Trans. Fluid Temp. Sensor Ckt 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_SWOFF Neutral Position Switch Circuit Problem (A/T)
P1101  N_SW Neutral Position Switch Circuit Problem (M/T)
P1102  BR Pressure Sources Switching Solenoid Valve Circuit Malfunction
P1103  TRQ Engine Torque Control Signal Circuit Malfunction
P1120  ST_SWON Starter Switch Circuit High Input
P1121  N_SWON Neutral Position Switch Low Input (A/T)
P1122  BR_HI Pressure Sources Switching Solenoid Valve Circuit High Input
P1141  QA_RHI MAF Sensor Circuit Range/Performance Problem
P1142  TH_RLOW Throttle Position Sensor Ckt Range/Performance Problem
P1143  PS_RLOW Pressure Sensor Ckt Range/Performance Problem (Low Input)
P1144  PS_RHI Pressure Sensor Circuit Range/Performance Problem (High Input)
P1400  PCVSOL_LO Fuel Tank Pressure Control Solenoid Circuit
P1420  PCVSOL_HI Fuel Tank Pressure Control Solenoid Valve Circuit High Input
P1421  EGRSOL_HI EGR Circuit High Input
P1422  CPC_HI EVAP Purge Control Valve Circuit High Input
P1423  VCMSOL_HI EVAP Vent Control High Input
P1440  PCV_FLOW Fuel Tank Pressure Control System Function Problem (Low Input)
P1441  PCV_FHI Fuel Tank Pressure Control System Function Problem (High Input)
P1442  FLVL_R2 Fuel Level Sensor Circuit Range/Performance Problem 2
P1500  FAN_1 Cooling Fan No. 1 Circuit Malfunction
P1502  FAN_F Cooling Fan Function Problem
P1507  ISC_SHI Idle Control System Malfunction (Fail-Safe)
P1520  FAN_1HI Radiator Fan Relay 1 Circuit High Input
P1540  VSP_S Vehicle Speed Sensor Malfunction 2
P1700 (2) ATTH TP Sensor Circuit Malfunction (A/T)
P1701 (2) ATCRS Cruise Control Set Signal Ckt Malfunction (A/T)
P1702 (2) ATDIAG A/T Diagnosis Input Signal Ckt Malfunction
P1722 (2) ATDIAG_HI A/T Diagnosis Input Signal Ckt High Input
P1742 (2) ATDIAG_2 A/T Diagnosis Input Signal Ckt Malfunction
(1) When using Subaru Select Monitor (SSM).
(2) Covered in entirety in the TRANSMISSIONS section.
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