scangauge / ultragauge warm up to closed loop ?

[surfstar]

I have an ultragauge on my 2005 Saturn Vue and have noticed that it stays in open loop for quite a while during the warm up period. Like 9+ miles of 35-55mph driving yesterday. How quickly does your vehicle go into closed loop?

I'm thinking I may have an o2 sensor not heating quickly enough, yet not bad enough to throw a code. The bank 1 #1 sensor stays at .4-.5 range until closed loop, then switches throughout the range and seems to function fine. Just seems to take a while to get there and I'm wondering what 'normal' warm up time is.

 

[The_Eric]

Last time I checked the one in my Elantra/2.0, it took about 15-20 seconds (in the dead of winter).

I agree that yours is getting slow.

 

[gathermewool]

On my old '97 Legacy, within 1 minute, even on the coldest days. My '08 STI, 15-20 seconds. My gf's 2003 Civic, less than 30 seconds.

 

[jstutz]

I also have an ultragauge, how do you tell how fast it is going into closed loop?

 

[JHZR2]

My cars generally are in the 15-sec range. Im often closed loop by the time I crank the car and get my seatbelt buckled.

All the more reason NOT to do an extended warm-up.

 

[surfstar]

Originally Posted By: jstutz
I also have an ultragauge, how do you tell how fast it is going into closed loop?


Upper right of the ultragauge has a loop that is present on any gauge screen - closed loop will resemble an oval, open loop has a break in that oval. I just was watching it during my drive, along with o2 voltages, and am wondering if a lazy sensor is what's causing such a delay in going to closed loop.


Follow-up question: Would replacing that o2 sensor make a difference? I hate to throw $$ at a part if it doesn't help. It's not throwing any o2 codes, but something seems amiss.

 

[George7941]

My front O2 sensors start switching within ten seconds of start up. I can monitor the O2 sensor voltages on my Innova 3130 scan tool, under LIVE DATA.

 

[Patman]

I checked on that this morning in my Civic with my Scangauge II and it went into closed loop within about 15-20 seconds from a cold start (it was 70F this morning when I started the car)

 

[surfstar]

I think a front o2 is ~$35 plus shipping from rockauto, seems worth throwing one in as I plan on keeping this a long time anyways and I'd have to replace it at some point.

Thanks for the replies everyone.

 

[dakota99]

My dakota goes into closed loop around 100F water temp. 105F in winter. Which is roughly 30 seconds of running time for summer and can be up to a minute during the winter.

 

[mechtech2]

That is way too long. There should be a code thrown.
A sluggish O2 or heater circuit may be the problem.

 

[surfstar]

Conclusion/follow-up:

Replaced the o2 sensor yesterday and it goes into closed loop in a few seconds or up to 20 or so on a cold start. Definitely better than the miles it took before. No o2 codes were thrown, though. I have/had an intermittent ignition code - I would be ecstatic if this by chance was cleared with the new o2 sensor!