I put a new egr in and cleaned any blockage I found going from egr valve to the intake. Service light is still on. Egr feedback tested .12v once and no voltz most of the time.tested 5volt ref-got 5.1v. Tested power source got 11.8 v. Ground circuit was good-it read 12v when I tested it to the battery.I looked at pcm wires and didn't c anything burnt. Not sure what wires to test...there is a lot of them. I Seen #'s next to the wires in the pcm. Not sure what to do next.If u can help it would b much appreciated
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2002 Pontiac Bonneville Question: Service engine light is on. po405 code power sourc egr pintle position low circu
Answer #1pushrod January 27, 2014, 15:13Master
Did you clear the codes after repair?
Replyjaymcg16, January 27, 2014, 17:31Rookie
Yes I cleared the codes a couple times and they came back on
Replypushrod, January 28, 2014, 01:47Master
Sccaner needed to check live data, egr valve position % to start with.
Replyjaymcg16, January 28, 2014, 08:52Rookie
OK. I was thinking it was a short in egr feedback or ground. Do I have to take it to a mechanic to have it scanned?