LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2000 >> SC 300 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0420 Or P0430: Catalyst System >> Confirmation Test
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Confirmation Test

Connect Lexus scan tool to Data Link Connector (DLC) No. 3. See Figure. Ensure all accessories are turned off. Start and warm engine to normal operating temperature. Increase engine speed to 2500-3000 RPM for 3 minutes. Using Lexus scan tool, ensure heated oxygen sensors (bank No. 1 and 2, sensor No. 1 and 2) feedback to ECM fluctuates around .5 volt.

scientia non olet · About LEMON Manuals