CEL light for O2 Sensor

JBird20 · Post by **JBird20** » Wed Aug 06, 2008 2:39 am

a log will do nothing..it will shop u a solid line and then a break showing the CEL...its only only comes on when u come on the decel....my 02 sensor is plugged into my harness..im gonna try to unplug it and see if it happens again

RoadXY · Post by **RoadXY** » Fri Aug 08, 2008 5:59 am

Sometime's there is more to get out of an log and an .cal then we (users) know of

Bindegal · Post by **Bindegal** » Fri Aug 08, 2008 5:31 pm

This O2 CEL is a weird thing. I have one customer driving for months in open loop, no CELÂ´s ever. And another costumer with CEL 1 coming up daily. He used to run ROM59, first in open loop, later with wideband closedloop, both causing CELÂ´s. Now we switched to CalvinÂ´s special tip-in-fixed-ROM60+wideband closedloop but I donÂ´t know yet if this fixed it.. stay tuned

/Allan

Piv · Post by **Piv** » Tue Jan 27, 2009 5:59 pm

Bindegal wrote:This O2 CEL is a weird thing. I have one customer driving for months in open loop, no CELÂ´s ever. And another costumer with CEL 1 coming up daily. He used to run ROM59, first in open loop, later with wideband closedloop, both causing CELÂ´s. Now we switched to CalvinÂ´s special tip-in-fixed-ROM60+wideband closedloop but I donÂ´t know yet if this fixed it.. stay tuned /Allan

I stay tuned Bindegal, but any explanation ? Still working ? I got the same problem today, disable everything but as soon as I disconnect the O2 sensor the cel light come on

Post by **calvin** » Tue Jan 27, 2009 7:41 pm

send me log and cal pls so i can debug

Piv · Post by **Piv** » Tue Jan 27, 2009 7:59 pm

I dont have a log but here the .cal

Post by **calvin** » Tue Jan 27, 2009 11:06 pm

Piv wrote:I dont have a log but here the .cal

can't do anything without log

Post by **Gaskleppie** » Wed Jan 28, 2009 3:12 am

I read something on an other forum. That the O2 error often comes when you have a AEM wideband connected to the ecu. When you go off the throttle it gives a certain voltage to the ecu which causes O2 errors. Can you confirm this?

Bindegal · Post by **Bindegal** » Wed Jan 28, 2009 4:07 am

My customer (car owner without standard o2 sensor) sold the car, crashed it, whatever so my diagnosis sort of stopped right there. Sorry. /Allan

Post by **Bugermass** » Wed Jan 28, 2009 3:59 pm

I always use \"race only ecu\" and i've never had this random O2 problem..

Piv · Post by **Piv** » Wed Jan 28, 2009 6:35 pm

calvin wrote:
Piv wrote:I dont have a log but here the .cal
can't do anything without log

Ok, I'll know next time And I'll try race ecu as well

b20beast · Post by **b20beast** » Thu Jan 29, 2009 2:38 pm

i also get this cel it happens during decel i think i have lc1 wideband and use serial