2002 Cavalier sensors incomplete after 220+ miles -- need ready for insp.

E

Erin

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#1
I have a 2002 Chevy Cavalier, 2.2L, manual trans. The check engine light was on due to "P0440 Evaporative Emission Control System Malfunction". I cleared the errors, was issued a temporary inspection (expires in a few days), and drove to get the sensors ready for inspection. After about 70 miles, the O2 and catalyst sensors had gone from "inc" to "ok", but the evap sensor is still showing as incomplete. I've now driven 220+ miles -- still incomplete. (aahh!) The garage where I was getting it inspected at pretty much told me tough cookies. After searching around other forums, I think it may have to do with a TSB -- NHTSA ITEM NUMBER - 634261, but I don't have a full description of it. Would really appreciate any insights. Thanks a lot!
 

Gus

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#2
You cleared the code, but did you fix the problem that caused it?
 
E

Erin

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#3
No.. didn't fix the problem, because the error code was vague. Since I didn't know, I was hoping it had just been something trivial to cause it initially -- like a loose gas cap -- and that it just never switched off.

I'm sure I should have just paid the garage the $90 to diagnose the problem before, but I'm unemployed and trying to fix it myself. Could the problem that caused the error code initially be keeping the sensor from switching from "incomplete" status now?
 
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#4
NHTSA listing numbers of TSB's is lacking and pretty much useless. trying to be nice ;D

If there is no current code, and CEL is off let us know.
The code was p0440 (correct??) If so I would have me checking the purge solenoid, checck wiring- pluged in OR damaged.

Also ......are you doing the required steps to complete a "drive cycle" ......google it.

Also depending on your State... where are you?........the monitors may NOT all have to set "complete". worth checking ....
If la la land forget it your screwed.
 
E

Erin

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#5
Thanks for replying!

I found some other numbers for the TSB... would these be useless too? Manufacture ID 00-06-04-011A, description was just "Evaporative Emissions DTC", and another number.. ID 114214.

No, there is no current code and CEL is off. Yes, the code was p0440. Thanks for that advice!

I looked up the drive cycle steps, and the only thing I hadn't done was let it coast without touching the clutch to 20mph.. but that was for EGR, Purge and Fuel Trim diagnostics. I'll give it a shot anyhoo.

And I heard from the shop that that monitor in particular had to be complete to be inspected (but not the other 2 that Did turn off if I had an older car) -- I'm in NYS.

Thanks for your help!
 
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#6
00-06-04-011A is a good number it refers to a TSB that is a technical suppliment and a system overview NOT a specific issue or repair procedure.

Have you done the simple easy check of evap hoses, purge solenoid wiring, canister hoses?
 

MoparFan

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#7
First a basic item....

If you're keeping your gas tank very full or running it very low, chances are that the EVAP system is not running its test. Fuel level must be between 15% and 85% of tank capacity to run the EVAP system test on itself.
 

jjm

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#8
Ahhhhh those magical TSB's... just print one up and the vehicle is fixed! It's a miracle!

Perhaps it would be better to look into troubleshooting the P0440 code... basics. Rarely are any of the TSB's requested here are of any help. If you need a troubleshooting tree <a href="http://www.myaffiliateprogram.com/u/alldata/t.asp?id=1035">AllData</a> has got 'em.

Joe

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Transman

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#9
My $.02 here, If that is the only readiness monitor that hasn't set then, at least in my state, you should pass your inspection as long as there are no codes present and all the other monitors have flipped. Transman
 
E

Erin

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#10
Thanks for the recent tidbits and suggestions.

okay, so I got it out on the parkway and did the 55mph coasting to 20 mph thing to hit the rest of the parts of the drive cycle..still no change.

I've had the gas tank at all sorts of levels for the past 300 miles that I drove.. It's currently full. Whoops. But for most of the miles, it was between 1/4 and 3/4 full.

As for checking the wires, hoses, etc., I still need to find a good diagram to tell me where everything is.. Any suggestions?

And I've already been told by the guys doing the inspection that not having that particular monitor check out is cause to fail inspection.


:(

Argh! I miss having old crappy cars where it didn't matter if the CEL was on!
 
E

Erin

Guest
#11
In desperation, I took it to a 3rd garage, and that turned out to be the magic number.. Nothing had changed, but it passed inspection. Thanks for all your help, guys!