Secondary air showing not ready on scan tool

2001 CHEVROLET S-10
203,000 MILES • 2.2L • 4 CYL • 2WD • MANUAL
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CRAIG_1
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Have replaced the pump, solenoid valve, shutoff valve, check valve, and catalytic converter. Secondary air still showing not ready on scan tool. Everything else is green (ready).I also replaced the inline vacuum delay valve. Did I miss something? I cannot find the EGR valve. Does it have one? The truck has had several cold starts and air still not ready. I can hear the pump run when it starts up. What else can I do?
Feb 19, 2020 at 6:40 AM
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ASEMASTER6371
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Good morning,

The O2 sensor has to read lean to tell the ECM that the pump is working.

It could be the O2 sensor or it could be a clogged passage in the head from the pump plumbing.

Make sure the passage in the head is clear of all soot.

Roy
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Feb 19, 2020 at 8:46 AM
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CRAIG_1
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I'll check the voltage on the 02 sensor during cold start and after. I'm pretty sure I saw voltage fluctuation when I looked at live data. There aren't any dtc's. Before I replaced the pump and valves there was a code. Don't remember the actual code but it was saying there was an exhaust leak. That is when I started replacing the air system. Thanks
Feb 19, 2020 at 9:04 AM
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ASEMASTER6371
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I would really like to know that code.

Did you clear it or did it just go away?

If it just went away, it will be stored in history. If you cleared it, it is gone.

Roy
Feb 19, 2020 at 9:10 AM
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CRAIG_1
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I cleared it. It was a couple of months ago. Do you know if there is an EGR valve?
Feb 19, 2020 at 9:11 AM
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ASEMASTER6371
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Information for you on setting the monitor.

Roy
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Feb 19, 2020 at 9:18 AM
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CRAIG_1
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The scan tool im using has a secondary air injection reaction system monitor $03
Component ID $01
Min N/A
MAX $0000
Test Value $0000
Status OK

Not sure what it means. Looks like it didn't get a reading.
If the test isn't completing i don't know why. Thanks for the info.
Feb 19, 2020 at 9:58 AM
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ASEMASTER6371
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It says status okay.

Is it still showing incomplete?

Can you post a snapshot of that on your reader?

Roy
Feb 19, 2020 at 12:18 PM
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CRAIG_1
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Air is red and all others are green. It's hard to see in the photo but the bottom left is air and is the only one red.
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Feb 19, 2020 at 12:28 PM
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ASEMASTER6371
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It says OK for the status which means it is set.

Roy
Feb 19, 2020 at 12:59 PM
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CRAIG_1
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Okay! But why is it red?
Feb 19, 2020 at 1:00 PM
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ASEMASTER6371
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The picture is not clear enough to see that.

Roy
Feb 19, 2020 at 1:14 PM
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CRAIG_1
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Thanks for your help. When I get it figured out I'll post it.
Feb 19, 2020 at 6:07 PM
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ASEMASTER6371
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You are welcome.

always glad to help.

Roy
Feb 20, 2020 at 2:18 AM