Help with CEL

[p33r]

Quick question,

I have a DC5S. I'm getting a CEL with the following error code. It's been on for quite some time:

41-4 Permanent HO2S (A/F SENSOR) S1 HEATER
(PO135) DTC CIRCUIT MALFUNCTION

I've got aftermarket cat, catback, header. Does this mean it fried my o2 and i need to replace my primary o2 sensor?

I heard the denso ones are pretty much OEM but without spending $500. Would this be a viable replacement?

http://www.ebay.com.au/itm/DENSO-234...#ht_1939wt_986

Thanks

[p33r]

also i don't know how relevant this is but forgot to mention that I do have an angled defouler. it kept the CEL off for a while, popping up here and there. then one day it came on and has stayed on until now.

[T-BaGGeR]

I think that's the wrong part number for the primary in the DC5. It's 234-9005

[p33r]

^pretty sure that's for the DC5R. I think DC5S requires 234-9064 unless you're going kpro.

would like to confirm this also

[p33r]

Any help guys?

[T-BaGGeR]

If no one can help you here, hit up clubrsx. They have a tonne of info.

[p33r]

yea but i was just worried the AUDM DC5S might require a different o2 sensor compared to the 05-06 RSXs.. or are they the same?

[benson]

If you dont want new, i have second hand one here.

Pm me.

[T-BaGGeR]

They are the same car in the states