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#16082 - 12/30/09 02:26 PM PO 430 Cat system efficency below threshold bank 2
bobm396
Junior Member


Registered: 12/30/09
Posts: 3

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Ford Windstar
1997
3.8
auto transmission
van starts and runs very well.
Van has 198,000 miles
Last tune up 98,000 miles (plugs, filter etc.)
Oil changed every 3500 miles
Will not pass emmisions due to
PO430 Cat system efficency below threshold bank 2
PO153 02 circut slow response Bank 2 sensor 1
all indications point to a new cat which on this van is about $550.00.
The details
LTFT B1 = 14%
LTFT B2 = 14%
O2SB1 S1 (V) RANGE FROM .040-.810
02SB1 S2 (V) RANGE FROM .040-.840

02SB2 S1 (V) RANGE FROM .070-.855
02SB2 S2 (v) RANGE FROM .070 -.800

I have changed the 02 sensor after the cat. on bank 2
It did not help
Based on what I have read the ranges appear to be with in limits on the above data.
my next thought was to unplug all 4 02 sensors and swap plugs from Bank 1 to Bank 2 to see if the error goes to Bank 1. If so then maybe the cat is really bad.
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#16083 - 12/30/09 02:28 PM Re: PO 430 Cat system efficency below threshold bank 2 [Re: bobm396]
bobm396
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Registered: 12/30/09
Posts: 3

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I really am a junior member. The message posted in the pre 1996
can someone help move it to the right forum
Sorry......Bob
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#16084 - 12/31/09 07:10 AM Re: PO 430 Cat system efficency below threshold bank 2 [Re: bobm396]
Mohawkmtrs
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Registered: 09/09/06
Posts: 71
Loc: Tyendinaga Mohawk Territory, O...

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Before condemning the cat, perform a tune-up (it's due anyways) and replace the upstream O2 sensor on Bank 2 (it's likely worn out with those miles and won't pass the smog test).

Get the parts from the dealer as aftermarket parts can be problematic.

Clear the codes and see if the cat code returns...IF it does, get a GOOD QUALITY cat.
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#16085 - 12/31/09 10:30 AM Re: PO 430 Cat system efficency below threshold bank 2 [Re: Mohawkmtrs]
bobm396
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Registered: 12/30/09
Posts: 3

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Thanks for taking the time to answer !!!
Will give it a try
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#16199 - 05/05/10 05:24 AM Re: PO 430 Cat system efficency below threshold bank 2 [Re: bobm396]
prince
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Registered: 05/05/10
Posts: 1

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hi guys,..
i am new in this forum,..
i found that it is very helpful for me because it contains very informative posts and sharing s,..thanks
_________________________
alex

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