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Home >> Buick >> 2001 >> LeSabre Custom, 4T65E/MN3 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P0420: Catalyst System Low Efficiency >> Notes

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DTC P0420: Catalyst System Low Efficiency: Notes

NOTE: For circuit reference, see WIRING DIAGRAMS article.

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