P0420

DTC P0420 CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 1)

DTC DETECTING CONDITION:
- Detected when two consecutive driving cycles with fault occur.
- GENERAL DESCRIPTION P0420

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

CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode, and Inspection Mode. Clear Memory Mode Inspection Mode

WIRING DIAGRAM: