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Home >> Toyota >> 2003 >> Matrix Base, FWD, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System Self Diagnostics >> Diagnostic Tests >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank No. 1) >> Circuit Description & Possible Causes

Circuit Description & Possible Causes

For circuit description and possible causes, see Fig 1.

Fig 1: DTC P0420 Circuit Description

G00241582

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