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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1133 (Engine Controls Diagnosis - 3.4L (DTC P0140-DTC P0496)) >> Diagnostic Trouble Codes >> DTC P0420 >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The PCM determines that the catalyst's oxygen storage capacity is below a threshold considered acceptable.

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