OBD2 Drive Cycle - Tuning Forum

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OBD2 Drive Cycle
Tuesday, August 29, 2006 7:31 PM
Oh how I would just like to kick back and let this sort itself out.

I have a engine light on, so armed with a wrench in one hand,
and a little more than my wits in the other, here I go head first into diagnosis.

get scanner, unplugging the battery, no work-ie..

"...P0141..." umm... O2 sensor heater circuit malfunction (bank 1, sensor 2)

bank 1? ahh 4 cyl..
1 bank..

O2 sensor...easy

O2 sensor Heater? "...there are two modes of operation on a computer controlled vehicle "open-loop" and "closed-loop" The vehicle operates
in open-loop mode when the engine is cold, before it raches normal operating tempreture.....open loop...O2 readings ignored.....produces more emissions....closed loop...better... Heater intigrated in O2 sensor to speed "closed-loop" operation... "

ahh makes sence..

what.. 2 sensors..

1 heated, (down stream from cat) 1 non heated (on manifold)

ok..

"....change sensor...perform OBD2 Drive Cycle Test, test is VEHICLE SPECIFIC... see your manual for details..."

checked manual.. no info... checked VEHICLE MANUAL.. nothing there either..

I have a 2000Cavalier, Z-24 (ld9 engine) auto, w/air.. and I am wondering if anyone knows
where I can find this "OBD2 Drive Cycle" information??

Because I stupidly changed the wrong 02 sensor, and I am gettinga barrage of different codes now, from "Voltage too low during power enrichment"
to "02 sensor Malfunction, voltage too high"

arrgh... all I know is that its off warrenty.. and all these problems show up..

I cleared the MIL code today, and I should have that O2 sensor changed by the weekend... pretty pricy though...

does anyone have any more information about this "OBD2 Drive Cycle" for the 2000 Cav?



Re: OBD2 Drive Cycle
Tuesday, August 29, 2006 8:07 PM
Re: OBD2 Drive Cycle
Wednesday, August 30, 2006 5:11 AM
If you have HPT, its real easy to get completed readiness tests



P&P Tuning
420.5whp / 359.8wtq

Re: OBD2 Drive Cycle
Wednesday, August 30, 2006 8:29 PM
Oh fantastic...

now I can get the gremlin the hell out of my car....


sweet..


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