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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 192 (Engine Control System Self-Diagnostics - 4 CYL (PZEV)) >> Diagnostic Tests >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank No. 1) >> Confirmation Driving Pattern For Readiness Monitor

Confirmation Driving Pattern For Readiness Monitor

WARNING: This page is about a different car, the 2003 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.

For description of readiness monitor, see READINESS MONITOR DRIVE PATTERN  under SELF-DIAGNOSTIC SYSTEM. Performing this confirmation pattern will activate the front catalyst monitoring by the ECM. This is useful for verifying the completion of a repair. For confirmation driving pattern, see Fig 1.

Fig 1: DTC P0420 Confirmation Driving Pattern For Readiness Monitor
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