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Home >> Toyota >> 2004 >> Matrix Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 132 (Engine Control System Self Diagnostics) >> Diagnostic Tests >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) &/Or P0430: Catalyst System Efficiency Below Threshold (Bank 2) >> Possible Causes
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Possible Causes

WARNING: This page is about a different car, the 2003 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

For DTC detection condition and possible causes, see Fig 1.

Fig 1: DTC Detection Condition & Possible Causes
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