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P0430 Diagnostic Trouble Code Discussion for January 2009

Catalyst System Low Efficiency (Bank 2)

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Trouble Ticket Help Requests for DTC P0430
Help Request Posted
2002 Chevrolet Tahoe LS 5.3L Surge, Misfire, MIL Lamp on VIN: 1GNEK13Z42
P0430: Catalyst System Low Efficiency (Bank 2). ... with this one. When driving the vehicle under hard acceleration power falls off and the engine begins to surge. If the throttle is backed off a little then the power returns. The first code to come up was a P0301 so I moved the coil pack, plug wire, and pl...
January 24, 2009