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U5/Low Emissions Models

The content of this article/image reflects the changes Identified in
TSB # 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.

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:






STEPS 3 AND 4:






STEPS 5-8:






STEPS 9-11: