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P0430 Diagnostic Trouble Code Discussion for January 2011

Catalyst System Low Efficiency (Bank 2)

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Trouble Ticket Help Requests for DTC P0430
Help Request Posted
2007 Chevrolet Express 3500 4.8L MIL Lamp on VIN: 1GCHG39V47
P0430: Catalyst System Low Efficiency (Bank 2). ... has a P0430 that keeps comming back. The Cat has been replaced twice but with factory GM products. The Up Stream Oxygen Sensor was also repalced. At first it was showing misfires on back 2 with excessive back pressure and had a P0430 and P0300. Since the f...
January 07, 2011
2006 Ford F-150 XLT 5.4L Stall, MIL Lamp on VIN: 1FTPW12V36
P0430: cat eff. need help on this one! this vechile wont idle i cleared the codes and they didnt come back all pids look good. what am i missing?
January 12, 2011
2005 Jeep Liberty Limited 3.7L MIL Lamp on VIN: 1J4GL48K85
P0430: Catalyst Efficiency Below Normal (Bank 2). ... may be able to be shed on this one. This vehicle came in from a used car dealer. He stated that his wife has driven this for about a year with no problems. He sold if and MIL light pops on. P0430 Cat Eff Bank 2. Tested it out and found bad upstream O2 sen...
January 19, 2011