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P0430 Diagnostic Trouble Code Discussion for June 2009

Catalyst System Low Efficiency (Bank 2)

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Trouble Ticket Help Requests for DTC P0430
Help Request Posted
2003 Chevrolet Suburban 1500 LS 5.3L No Start VIN: 3GNFK16Z63
P0430: Catalyst System Low Efficiency (Bank 2). I have this 2003 chev. suburban with a 5.3l, this truck will not start unless you wait 3 to 5 seconds for the fuel pump to build pressure, if you wait longer then that the pressure drops to 0 in almost 30 sec. Also if you go to start the truck right away befor...
June 25, 2009