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Home >> Chevrolet >> 2004 >> S10 Pickup >> Repair and Diagnosis >> External Pages >> Different car >> Section 62 (Engine Controls Diagnosis - 4.3L (DTC P0140 To DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, P1683, Or P2610)) >> 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 GMC Safari and 2004 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

The PCM determines that the oxygen storage capability of the TWC has degraded to less than a calibrated threshold.

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