P0420
The content of this article/image reflects the changes Identified inTSB # 18-97-06
as of 01/04/06
and applies to 2005 Legacy and Baja models
DTC P0420 CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 1)
DTC DETECTING CONDITION:
- Two consecutive driving cycles with fault
- GENERAL DESCRIPTION
TROUBLE SYMPTOM:
- Engine stalls.
- Idle mixture is out of specifications.
CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode and Inspection Mode.
Wiring Diagram:
STEPS 1-3:
�FSTEPS 3-5:
STEPS 6- 8:
STEPS 9-11:
