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Car Forum / Saab Cars / January 2008

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Monitors need reset

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Explorer - 05 Jan 2008 20:49 GMT
My 1996 Saab 900S did not pass the Tennessee emisions test.
The reason given was "Monitors need reset," and the issues were:
1. Heated O2
2. Catalytic converter
3. Evaporative control
4. Secondary air

What does all that mean? Just want to mention that my "Check Engine" light
never turned "ON" prior to the test failure and I know for sure that the
lightbulb is not burned out.
still just me - 05 Jan 2008 23:08 GMT
>My 1996 Saab 900S did not pass the Tennessee emisions test.
>The reason given was "Monitors need reset," and the issues were:
[quoted text clipped - 6 lines]
>never turned "ON" prior to the test failure and I know for sure that the
>lightbulb is not burned out.

Rather strange reason for failure. Usually they complain when you've
done the reset recently and they think you are hiding a problem.

I general, the check engine should light when you get a code in the
computer but I think it does watch for multiple occurrences before it
lights the dash light.

If there are Autozone stores near you, go to one. Ask them to read the
codes out of the computer and tell you what they see. It should match
the above list (mostly). Then have them reset the computer. They will
do all that for free.

I don't know how re-inspection is (if you pay for it, etc) but I'd try
for a re-inspection. The only issue I see is that, if they are like
other states, they'll complain about the reset unless you drive a lot
of miles.

Lastly, I'd guess you actually have a problem with that car. You may
or may note get through inspection but you should get it fixed. My
guess would be a bad O2 sensor, they are not uncommon failures. If
it's been gone a long time you may have cat converter issues. You'll
need to do some testing/work or have a shop do it for you.
Explorer - 06 Jan 2008 02:26 GMT
Thanks very much. I replaced the O2 sensor last year, and the secondary air
pump after that because it froze.
Though I never knew that Autozone can reset the computer. Thanks again.

>>My 1996 Saab 900S did not pass the Tennessee emisions test.
>>The reason given was "Monitors need reset," and the issues were:
[quoted text clipped - 29 lines]
> it's been gone a long time you may have cat converter issues. You'll
> need to do some testing/work or have a shop do it for you.
still just me - 06 Jan 2008 16:47 GMT
>Thanks very much. I replaced the O2 sensor last year, and the secondary air
>pump after that because it froze.
>Though I never knew that Autozone can reset the computer. Thanks again.

Makes more sense...probably there was a code stored in the computer
from those failures. Because it was very old, the emissions test
flagged it as "old and unreliable".

In that case, get it reset. Drive a while so that they don't fail you
for too few hours, then re-tst.
squid - 09 Jan 2008 04:52 GMT
> >Thanks very much. I replaced the O2 sensor last year, and the secondary air
> >pump after that because it froze.
[quoted text clipped - 6 lines]
> In that case, get it reset. Drive a while so that they don't fail you
> for too few hours, then re-tst.

If it is a motronic car(non-turbo) the flags will reset each time the
key is turned off. It has been a random occurring problem here in the
Great NW, and is the nature of that vehicle. Have you tried an
emissions test with this vehicle before? It can be a frustrating
battle with the tester, but the car has to complete a drive cycle to
set everything to ready, and be taken in to the test facility on the
same key cycle. Without turning key off, the test facility can read
that all status' are 'ready'. Then the key can be cycled to check mil
operation. If it is a turbo car, then it needs to be driven through a
drive cycle until all tests have ran and passed. Of course if there
are stored codes, that will not happen. Clearing the codes will reset
everything to 'unready'. You might talk to a service facility, or Saab
dealer, and see if they are familiar with this. The drive cycle is a
specific criteria designed for each test to run, a service facility
may have some information on this for you. Good luck.
Gerald
 
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