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New Code....Help....

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Old Aug 16, 2007 | 01:43 AM
  #1  
Gohard777's Avatar
Gohard777
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Burning Brakes
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From: Detroit Area Michigan
Default New Code....Help....

2004 Vette Convertible, 373 gears, LG longtube headers into Borla Stingers, 2800 stall converter.... new code came on while driving in heavy traffic, real slow,....P0420, when read by Predator, was told that it was Catalyst, Bank one, then something about Low Efficiency, Below Threshold,
Anybody knows about this?? Let me know and Thanks in advance,
You guys are Great!!.....bob.

Last edited by Gohard777; Aug 16, 2007 at 01:53 AM. Reason: more info...
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Old Aug 16, 2007 | 07:14 AM
  #2  
trussme's Avatar
trussme
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From: Magnolia Greens NC
Default Yes, it's your rear 02 Sensor..

Originally Posted by Limp1
2004 Vette Convertible, 373 gears, LG longtube headers into Borla Stingers, 2800 stall converter.... new code came on while driving in heavy traffic, real slow,....P0420, when read by Predator, was told that it was Catalyst, Bank one, then something about Low Efficiency, Below Threshold,
Anybody knows about this?? Let me know and Thanks in advance,
You guys are Great!!.....bob.
Bob...this is an common code for us folks with LT headers (hi-flo or no Cats,etc) when the rear 02 Sensors haven't been tuned out, OR, replaced with 02 Simulators. A tuner with an HP Tuner program will get about $150 to do this for you...or, if any 02 Sims are still available, a good set can run you $100 installed. The other side Bank2 will eventually come on with PO430 code...all Vette Mods come with an added cost, because they create certain changes to the stock set up. We all know that to be a Corvette fact of life....
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Old Aug 16, 2007 | 11:24 AM
  #3  
Mike L.'s Avatar
Mike L.
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From: Cooper City FL
Default

Originally Posted by Limp1
2004 Vette Convertible, 373 gears, LG longtube headers into Borla Stingers, 2800 stall converter.... new code came on while driving in heavy traffic, real slow,....P0420, when read by Predator, was told that it was Catalyst, Bank one, then something about Low Efficiency, Below Threshold,
Anybody knows about this?? Let me know and Thanks in advance,
You guys are Great!!.....bob.
I have seen people get this code randomly, it should just allow you to clear it and never be seen again.

Thanks
Mike
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