wideband being weird

[gtpsleeper]

went for a drive and noticed out of the blue my wideband gauge is cycling like a narrowband would read??? If I give it some throttle it goes back to normal... then it will randomly read normal on regular driving... then start cycling again???

Any ideas what could be going on?

maybe a bad o2?

 

[matt5112]

Thats how our pcm operates in closed loop.

 

[JoRoW99]

Mine does this too...in fact it almost always does it unless im at PE, so yes its in closed loop.

 

[gtpsleeper]

this is an AEM augo wideband not just some narrowband gauge hooked up to my stock O2 and Ive had for about a year now... isn connected to the pcm at all.... and has never "cycled"...

this is not normal for a wideband...

 

[Fivefingerdeathpunch]

So what numbers is it sweeping from?

Mine always does 14.3 to like 15.4 while bumming around.

 

[gtpsleeper]

see its not bumping like that... as Im cruising itll read like "15.2" then bounce max lean.... then back to X... etc etc just like a narrowband gauge would...

 

[gtpsleeper]

alot like this only not the same number...


AEM wideband problem - YouTube

 

[RamonGTX]

ah **** i was gonna say mine goes back and forth but damn not like that

 

[gtpsleeper]

Been looking for the last few days and have found different people with the same problem but no solution...

gonna test the AEM 02 today...

 

[gtpsleeper]

update in case this happens to anyone else... did a test on the 02 and it turned out to be faulty...

 

[matt5112]

Thanks for the update.