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Home >> Pontiac >> 1998 >> Firebird Formula, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes - 5.7L >> Diagnostic Trouble Codes >> DTC P0420 - TWC System Low Efficiency Bank 1 >> Notes

DTC P0420 - TWC System Low Efficiency Bank 1: Notes

NOTE: For circuit reference, see WIRING DIAGRAMS - 5.7L article.

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