Drive Cycle A
| DTC | Item | Condition |
|---|---|---|
| P0128 | COOLANT THERMOSTAT (ENGINE COOLANT TEMPERATURE BELOW THERMOSTAT REGULATING TEMPERATURE) | - |
| P0141 | O2 SENSOR HEATER CIRCUIT (BANK1 SENSOR2) | - |
| P014C | O2 SENSOR SLOW RESPONSE - RICH TO LEAN (BANK 1 SENSOR 1) | - |
| P014D | O2 SENSOR SLOW RESPONSE - LEAN TO RICH (BANK 1 SENSOR 1) | - |
| P015A | O2 SENSOR DELAYED RESPONSE - RICH TO LEAN (BANK 1 SENSOR 1) | - |
| P015B | O2 SENSOR DELAYED RESPONSE - LEAN TO RICH (BANK 1 SENSOR 1) | - |
| P0171 | SYSTEM TOO LEAN (BANK 1) | Diagnosis completes in drive cycle B or C as well. |
| P0172 | SYSTEM TOO RICH (BANK 1) | Diagnosis completes in drive cycle B or C as well. |
| P0300 | RANDOM/MULTIPLE CYLINDER MISFIRE DETECTED | Diagnosis completes in drive cycle B or C as well. |
| P0301 | CYLINDER 1 MISFIRE DETECTED | Diagnosis completes in drive cycle B or C as well. |
| P0302 | CYLINDER 2 MISFIRE DETECTED | Diagnosis completes in drive cycle B or C as well. |
| P0303 | CYLINDER 3 MISFIRE DETECTED | Diagnosis completes in drive cycle B or C as well. |
| P0304 | CYLINDER 4 MISFIRE DETECTED | Diagnosis completes in drive cycle B or C as well. |
| P0420 | CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 1) | - |
| P0459 | EVAPORATIVE EMISSION SYSTEM PURGE CONTROL VALVE CIRCUIT HIGH | - |
| P2096 | POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1 | Diagnosis completes in drive cycle B or C as well. |
| P2097 | POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1 | Diagnosis completes in drive cycle B or C as well. |
| P2195 | O2 SENSOR SIGNAL BIASED/STUCK LEAN (BANK 1 SENSOR 1) | - |
| P2196 | O2 SENSOR SIGNAL BIASED/STUCK RICH (BANK 1 SENSOR 1) | - |
Diagnostic procedure:
- Drive for 20 minutes or more at a constant speed of 80 km/h (50 MPH) or more.
- Stop the vehicle and idle for one minute.
- Read the temporary code using the Subaru Select Monitor or general scan tool. Ref. to ENGINE (DIAGNOSTICS) (H4DO) > Read Diagnostic Trouble Code (DTC) > OPERATION .