Engine - Diagnostics

DTC P0420 CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 1)

DTC DETECTING CONDITION:
- Detected when two consecutive driving cycles with fault occur.

TROUBLE SYMPTOM:
- Engine stalls.
- Idle mixture is out of specifications.

CAUTION: After repair or replacement of faulty parts, perform Clear Memory Mode Clear Memory Mode and Inspection Mode

Wiring Diagram:

Step 1-2:

Step 3-6:

Step 7-8: