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Home › Pontiac › 2003 › Vibe Base, FWD, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Control System - Self-Diagnostics › Diagnostic Tests › DTC P0420: Catalyst System Low Efficiency › Conditions For Setting DTC

Conditions For Setting DTC

HO2S 2 signal is as active as HO2S 1 signal.

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