Inspection Mode V
| DTC | Description & trouble part | Condition | Number of driving cycles on the detecting condition |
|---|---|---|---|
| P0420 | CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD BANK 1 | - | 2 |
WARNING:
When performing inspection mode V on a public road, pay sufficient attention to the traffic condition and give the highest priority to safe driving.
NOTE:
Perform the inspection mode after warming up the engine except that the engine coolant temperature at engine start is specified.
- Check that the battery voltage is 12 V or more and fuel remains approx. half [20 - 40 L (5.3 - 10.6 US gal, 4.4 - 8.8 Imp gal)].
- Using the Subaru Select Monitor, clear the memory of [Engine Control System]. Ref. to COMMON (diag)>CLEAR MEMORY .
- Drive according to the drive pattern described below.NOTE:
- The condition of acceleration or constant driving can be changed according to different traffic conditions.
- If diagnostic values have not been input after driving, repeat the cycle from step (C) without stopping the engine.
- Read the temporary code using the Subaru Select Monitor or general scan tool. Ref. to COMMON (diag)>DIAGNOSTIC TROUBLE CODE (DTC) .