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Originally posted by john99gtp@Sep 27 2006, 03:50 PM
I keep getting this code comming up after a few weeks P0420 Catalyst System Efficiency Below Threshold (Bank 1). What hould I do?
[snapback]140842[/snapback]
Originally posted by BigJermGTP+Sep 27 2006, 07:47 PM--><!--QuoteBegin-john99gtp@Sep 27 2006, 03:50 PM
I keep getting this code comming up after a few weeks P0420 Catalyst System Efficiency Below Threshold (Bank 1). What hould I do?
[snapback]140842[/snapback]
I'm assuming it's your catalitic converter. It may be clogged.
Try a new rear O2 sensor. If it still comes up you may have to replace the cat or delete it. If you get a straight pipe instead of the cat you need to tune it out or get a rear O2 simulator.
Just a guess on my part, just giving you some ideas of some things to check.
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