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Trouble codes PO418 & PO412

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Old 01-18-2006, 04:16 PM   #1
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Default Trouble codes PO418 & PO412

I have an 02 Z28 and these codes just popped up a little after installing an
STS kit. Does anyone know what the problem may be, thanks.
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Old 01-18-2006, 05:17 PM   #2
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^^^^^
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Old 01-18-2006, 09:19 PM   #3
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Quote:
Originally Posted by JD_Z28
I have an 02 Z28 and these codes just popped up a little after installing an
STS kit. Does anyone know what the problem may be, thanks.
P0418 Secondary Air Injection System Relay A Circuit Generic OBDII Code

P0412 Secondary Air Injection Switching Valve A Circuit Generic OBDII Code

https://ls1tech.com/forums/pcm-diagnostics-tuning/209783-need-lookup-ses-code-look-here.html

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Originally Posted by horist
http://www.obdii.com/codes.asp
if it asks you to regsiter.. the fields are dummy fields...
Type gibberish into them and it'll accept it... that's what I do
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Old 01-19-2006, 05:41 PM   #4
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I would check the AIR pump fuse first.
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air, cobra, code, codes, engine, gm, gmc, obd2, po412, po418, relay, secondary, silverado, trouble, valve

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