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#11276 - 08/03/05 07:42 PM Code PO420
Jose Offline
Member
Registered: 11/14/04
Posts: 354
Loc: Phoenix, AZ
That code is on right now, its says catalyst insuficent flow beyond treshhold, something like that what could it be?
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#11277 - 08/03/05 08:15 PM Re: Code PO420
snowcrash Offline
Member
Registered: 05/05/03
Posts: 868
Loc: charlotte, nc
not really sure, but by you saying catalyst, it kinda makes me believe that it is the rear o2 sensor. other than that, i don't know!
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charlie
black 98 gtp sedan, 222,000 and running great with the new used tranny! laugh
zzp 3" d/p aluminized
dhp 1.0
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#11278 - 08/03/05 08:41 PM Re: Code PO420
Jose Offline
Member
Registered: 11/14/04
Posts: 354
Loc: Phoenix, AZ
i changed that sensor not to long ago.
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#11279 - 08/03/05 10:59 PM Re: Code PO420
Jose Offline
Member
Registered: 11/14/04
Posts: 354
Loc: Phoenix, AZ
how many oxygen sensors do our cars have?
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#11280 - 08/03/05 11:08 PM Re: Code PO420
AustinGTP Offline
Member
Registered: 05/23/03
Posts: 8078
Loc: Austin, TX
2, one at the U-bend to register a cat. The other is at the top of the D/P, right next to the rear spark plug on the drivers side.
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Bobby

Died 5/1/08, resurrected 5/15/08
ASCD SD hood, 17" Bullitts, Overkill PCM, 3.4" Pulley, NGK TR55IX, K&N 9" cone filter, JimmyC D/P, U-bend removed, Flowmaster 40 series, Hooker big bore tips with resonators, S/B brake lines, drilled/slot rotors, GMPP handling kit, KYB struts, F&R strut supports, HID's, LED's, 2.5" Air Dam, red GTP overlays on custom badges, white rear insert.
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#11281 - 08/03/05 11:11 PM Re: Code PO420
Jose Offline
Member
Registered: 11/14/04
Posts: 354
Loc: Phoenix, AZ
thats what i thought, the mechanic said ut could have four and i was like no only 2, he kept insisting so i just shut my mouth
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Next Freestyle bicycle, with 20 inch
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#223004 - 09/18/21 07:38 AM Re: Code PO420 [Re: Jose]
jiuer7845 Offline
Junior Member
Registered: 09/18/21
Posts: 8
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