1999 SILVERADO,4.8,V8,4X4,1500,AFTER CLEANING THROTTLE BODY,(VERY DIRTY),MIL LIGHT WENT OFF, BUT SCAN TOOL OBD11,GIVING ME CODE PO507,HOW CAN I RESET ECM TO LEARN NEW IDLE,MY UNDERSTANDING IS THAT ECM ADJUST IDLE WHEN THROTTLE IS DIRTY,SO NOW IT HAS TO RESET,SINCE IT'S CLEAN ,NOT SURE IF I GOT THIS RIGHT ANY ADVISE APPRECIATED AS ALWAYS
You can do a relearn first reset clear mil -code if you can do it with scanner or disconnect battery for a few minutes ----start and let idle for 3 minutes and watch idle should start going down turn off for 60 seconds and let idle again for 3 minutes turn off for 60 seconds and start up and take a drive for about 20 miles need to have speed get up above 44miles per hour for a bit than off gas and let decelerate than back up on speed do this a few times while on drive throttle body should relearn
If u can erase the code and that should turn off or reset the check engine light
I would disconnect battery. wait a few minutes. Reconnect battery & start
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