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Trouble Code Definition

OBD II DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION CHART

DTC SSM Title (1) Circuit Affected Probable Cause
P0100  QA Airflow Sensor Circuit Open/Short Circuit
P0101  QA-R Airflow Sensor Circuit Range/Performance Problem Bad Sensor
P0105  P-S Pressure Sensor Circuit Malfunction Open/Short Circuit
P0106  P-R Pressure Sensor Range/ Performance Bad Sensor
P0115  TW Coolant Temperature Sensor Circuit Malfunction Open/Short Circuit
P0120  THV Throttle Position Sensor Circuit Malfunction Open/Short Circuit
P0121  TH-R Throttle Position Sensor Range/Performance Bad Sensor
P0125  TW-CL Coolant Temp Too Low For Closed Loop Control Bad Sensor
P0130  FO2-V Front O2 Sensor Circuit Malfunction Bad Sensor, Bad Fuel
P0133  FO2-R Front O2 Sensor Circuit Slow Response Bad Sensor, Bad Fuel
P0135  FO2H Front O2 Sensor Heater Circuit Malfunction Open/Short Circuit
P0136  RO2-V Rear O2 Sensor Circuit Malfunction Bad Sensor, Bad Fuel
P0139  RO2-R Rear O2 Sensor Circuit Slow Response Bad Sensor, Bad Fuel
P0141  RO2H Rear O2 Sensor Heater Circuit Malfunction Open/Short Circuit
P0170  FUEL Fuel Trim Malfunction Any Part Of Fuel System
P0201  INJ1 Fuel Injector No 1 Inoperative Fuel Injector
P0202  INJ2 Fuel Injector No 2 Inoperative Fuel Injector
P0203  INJ3 Fuel Injector No 3 Inoperative Fuel Injector
P0204  INJ4 Fuel Injector No 4 Inoperative Fuel Injector
P0301  MIS-1 Cylinder 1 Misfire Detected Bad Igniter
P0302  MIS-2 Cylinder 2 Misfire Detected Bad Igniter
P0303  MIS-3 Cylinder 3 Misfire Detected Bad Igniter
P0304  MIS-4 Cylinder 4 Misfire Detected Bad Igniter
P0325  KNOCK Knock Sensor Circuit Malfunction Open/Short Circuit
P0335  CRANK Crankshaft Position Sensor Open/Short Circuit, Bad Sensor
P0340  CAM Camshaft Position Sensor Open/Short Circuit, Bad Sensor
P0400  EGR EGR Flow Faulty EGR Sys. Function
P0403  EGRSOL EGR Circuit EGR System Malfunction
P0420  CAT CAT Efficiency Below Threshold Bad CAT, Bad Fuel Control
P0441  CPC-F Incorrect EVAP Purge Flow Bad Purge Control Solenoid Valve
P0443  CPC EVAP Circuit Malfunction Open/Short Circuit
P0500  VSP Vehicle Speed Sensor Bad Sensor
P0505  ISC Idle Control System Open/Short Circuit, Bad Idle Solenoid
P0506  ISC-L Idle RPM Too Low Bad Idle Solenoid, Air By-Pass
P0507  ISC-H Idle Too High Idle Solenoid, Air Leaks
P0600  - Serial Communication Link Malfunction Open/Short Circuit
P0601  RAM Memory Check Error ECM
(1) SSM: Subaru select monitor.