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p0420 and p0430 with Kook's LT with Catted Y-pipe

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Old 01-02-2015, 11:23 AM
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Default p0420 and p0430 with Kook's LT with Catted Y-pipe

Hey, need a lil help here please!

I just picked up a 06 TBSS with some mods and i gotta get rid of these codes… darn emissions.

Pulling a couple codes, P0420 cat efficiency Bank 1 and P0430 cat efficiency Bank 2.

I would be thankful for any and all help or opinions to help remedy these two codes!

I know it has the Kook's Long Tubes with their Catted Y-pipe and all four o2 sensors. Also has a Borla Single to Dual Cat back. It also had a CIA which i have taken off and replaced with the stocker! I also have no idea if it has ever been Tuned?

It also has the dreaded Service Stablitrack = Steering sensor code "C0455". And a "C0040" for a right front wheel speed sensor. Both these seem easily fixed by new sensors.

I then have to tackle the darn, service Air Ride BS… it has already been converted to solid rear Coils.

Thanks,
Steve
Old 01-07-2015, 12:01 AM
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The aftermarket Catalytic converters are not as efficient as the OEM units That's why you're getting those codes.
Old 01-25-2015, 08:57 PM
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High flow cats often throw out the codes. Besides maybe the new kooks green cats


Is the truck tuned?

If not you should tune it after a headers install. And any tuner should be able to adjust your o2 sensors.

Where are you from ?
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