My battery was around 5 years old..and the shop that tuned it recommended i change it..i waited until it completely died last week to change it and was astonished at what had happened. I had recently got my car inspected and threw 7 codes (po101, po102,po106,po135,po410,po502,p1133)..i have always had a check engine light until i installed my new battery. Ive been driving now for a couple of weeks and still no light..idk i just thought it was kinda strange and figured I'd let some of you guys know..maybe it will work for others lol

 

all it did was reset the code if you had a problem it should come back once yoru computer see somethign wrong to throw the light again

 

what are those codes in reference to? i know the gm system doesnt run correctly if your under 9 volts or it shouldnt even start if its under 9 volts.

 

po101 - mass air flow curcuit out of range
po102 - mass air flow curcuit signal low
po106 - pressure circuit out of range
po135 - 02 heater circuit bank1 sensor
po410 - secondary air injection system
po502 - vehicle speed sensor low/no signal
p1133 - insufficent switching

 

Most of em sound like they could be low voltage related. In order to get the PCM complete all DTCs you could always do a drive cycle, but if you've been regularly driving it for a few weeks I can't imagine you haven't completed one by chance.