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Old 07-08-2009, 08:16 AM   #21
almies
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

The saturn has ~101k.

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Old 07-08-2009, 08:39 AM   #22
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

That's not much mileage for an O2 sensor to go but reading the output is one way to check if it failed. Any holes in the exhaust system leaking upstream of the sensor? An exhaust leak before the sensor can keep it from heating up to operating temperature (600F). A failed O2 sensor won't allow the EFI system to go into closed loop mode and keep the readiness monitors from completing. The front O2 sensor is the crucial one for the PCM to enter closed loop mode after a full engine warm-up.

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Old 07-08-2009, 09:14 AM   #23
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

Intake manifold vacuum leak. Its a 2000 SL-1, the 2k-2.5k surges are symptomatic.

You will not find a semi-failed O2 sensor with a multimeter. If you decide to change it then buy a Denso direct fit.

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Old 07-08-2009, 12:44 PM   #24
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

Does the MIL bulb check work?
IOW when you turn the key to "On" but do not start the car, does the light bulb light up?

I don't think I saw that in the thread?

If he mentioned it, ignore me....my wife usually does

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Old 07-08-2009, 12:58 PM   #25
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

Quote:
Originally Posted by steve_stang2003 View Post
Does the MIL bulb check work?
IOW when you turn the key to "On" but do not start the car, does the light bulb light up?

I don't think I saw that in the thread?

If he mentioned it, ignore me....my wife usually does
Yes, the bulb works.

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Old 07-08-2009, 12:59 PM   #26
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

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Originally Posted by OldNuc View Post
Intake manifold vacuum leak. Its a 2000 SL-1, the 2k-2.5k surges are symptomatic.
Would this actually relate to the readiness test?

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Old 07-08-2009, 01:10 PM   #27
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

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Originally Posted by almies View Post
Yes, the bulb works.
Ok! Just checking!

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Old 07-08-2009, 02:18 PM   #28
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

Quote:
Originally Posted by almies View Post
Would this actually relate to the readiness test?
It could be causing a lower exhaust temperature and this is what will keep those last monitors from running.

You have apparently normal operating temperature and you have driven adequate miles to get them to run. But they have not. A failure to get to a steady closed loop will prevent the monitors from completing. The "pending" you keep getting may be pointing to this. The monitor has initiated but been stopped by the car not staying in closed loop.

The vacuum leak, if you have one, is not present all the time so finding it will be a job and replacing the intake gasket is a all day job the first time you do it.

As was mentioned above by several people, the O2 sensor could be the problem, or at least a major contributor. As I said, stay away from teh Bosch sensors in general and the universal for sure. The NTK/NGK or the Denso sensors do work well.

What are you getting for gas mileage? Is is a bit lower than you expect?

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Old 07-08-2009, 04:03 PM   #29
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

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Originally Posted by OldNuc View Post
It could be causing a lower exhaust temperature and this is what will keep those last monitors from running.

You have apparently normal operating temperature and you have driven adequate miles to get them to run. But they have not. A failure to get to a steady closed loop will prevent the monitors from completing. The "pending" you keep getting may be pointing to this. The monitor has initiated but been stopped by the car not staying in closed loop.

The vacuum leak, if you have one, is not present all the time so finding it will be a job and replacing the intake gasket is a all day job the first time you do it.

As was mentioned above by several people, the O2 sensor could be the problem, or at least a major contributor. As I said, stay away from teh Bosch sensors in general and the universal for sure. The NTK/NGK or the Denso sensors do work well.

What are you getting for gas mileage? Is is a bit lower than you expect?
I hate to just replace random parts if they don't need it, but at the same time this thing needs to pass inspection. Who knows what the mechanic would charge.

Gas mileage is 35-38mpg. I have been getting that mileage for the past year when it passed inspection.

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Old 07-08-2009, 04:50 PM   #30
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

It passed a year ago. Has anything changed in the last year? Finding a mechanic who can diagnose a monitor failure to run is going to be both difficult and expensive.

Adding parts randomly is not real cost effective either. With your mileage it does not look like a continuous small vacuum leak. Exhaust manifold leaks will keep the O2 sensor from heating up or staying heated up but your mileage does not indicate that either. The only common part to those 3 monitors is temperature. The O2 sensor should have gone ready if you spent 15 minutes at 55 to 60 mph. That one is temperature, throttle position and closed loop. The only one of the three that can be hidden is the closed loop. You have none of teh symptoms of a defective TPS. The PCM thinks the temperature is normal and all indications are that this is correct. Closed loop is about all that is left. Have you done anything with the front O2 sensor connector or wiring? The sensor gets its oxygen reference from the connector so cleaning solvents and/or connector grease can kill it and not set a code, thats why I ask. The O2 sensor looks bad but it should also set a code and it has not.

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Old 07-09-2009, 05:59 AM   #31
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

Quote:
Originally Posted by OldNuc View Post
It passed a year ago. Has anything changed in the last year? Finding a mechanic who can diagnose a monitor failure to run is going to be both difficult and expensive.

Adding parts randomly is not real cost effective either. With your mileage it does not look like a continuous small vacuum leak. Exhaust manifold leaks will keep the O2 sensor from heating up or staying heated up but your mileage does not indicate that either. The only common part to those 3 monitors is temperature. The O2 sensor should have gone ready if you spent 15 minutes at 55 to 60 mph. That one is temperature, throttle position and closed loop. The only one of the three that can be hidden is the closed loop. You have none of teh symptoms of a defective TPS. The PCM thinks the temperature is normal and all indications are that this is correct. Closed loop is about all that is left. Have you done anything with the front O2 sensor connector or wiring? The sensor gets its oxygen reference from the connector so cleaning solvents and/or connector grease can kill it and not set a code, thats why I ask. The O2 sensor looks bad but it should also set a code and it has not.
I have not touched the O2 sensor.

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Old 07-09-2009, 06:15 AM   #32
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

Pay the $85 and quite guessing so far in here you have gotten repairs suggested between $85 and $400 and are still not passing. Go to a Saturn place and explain what is happening and have them scan it, chances are they can do the inspect and all right there and save you the time and money in the long run.

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Old 07-14-2009, 02:22 PM   #33
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

Well, the issue has been fixed. It was indeed the EGR valve stuck open in combination with buildup. They replaced the valve and cleaned it out the connectors. Passed inspection. Total cost is $458.XX.

$209 for the EGR valve($160 at autozone), $21 for the inspection, $85 for the computer hookup and the rest is labor plus taxes. I am still a little miffed at the cost of the computer scan, but itís fixed.

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Old 07-14-2009, 03:11 PM   #34
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

You should have had an EGR DTC code if the EGR was stuck or the passages were completely plugged.

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Old 07-14-2009, 03:24 PM   #35
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

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You should have had an EGR DTC code if the EGR was stuck or the passages were completely plugged.
When I took it to autozone and they hooked it up to their machine it said EGR pending, but no codes ever came.

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Old 07-14-2009, 03:47 PM   #36
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Default Re: 2000 SL1 failed inspection, vehicle readiness test?

That would mean that it was failing randomly but not consistently. Should have gotten the number of the pending code(s), if Autozone could extract them. If they were aware of pending codes they should have told you of the DTC number. Some failures have to occur 2 times in 1 key on cycle to set the SES light but they are stored as Pending. That means it happened once. If anybody in this thread had known that the pending code was an EGR code they would have jumped on it like a frog on a junebug. Plugged exhaust track is not at all uncommon on the gen-3 cars, along with sticky EGR valve.

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