Thread: p0171 and p0300 please help.

I hv an 08 na grand prix. I started it the other day and it ran like a bag of poop. I brang it In to the shop and it showed up with two codes. 171 & 300. Bank one running lean and multiple random misfire. The coil that feeds number 2 $5 coil pack wasn't firing. So I changed the coil with no luck. I chevked the pcv cleaned the tb. My battery terminals were corroded bad so I disconnected the battery cables to clean em up and now it won't start at all. It will turn over buf that's it. I started the first time after disconnecting the battery and it ran for 6 seconds and died.
I have no idea were to look now. Any help would be appreciated. It has 133000kms and well maintained.

I tried that already. Doesn't even sound like it wants to start. I'm not sure were my vacum lines are. I was thinking mb my cam sensor

Which one is the maf sensor?

This is driving me nuts. It ran before I disconnected the battery I checked my fuses. Just can't check the big square ones.

Is that the sensor in the rubber intake. The small one or is it the big sensor just before the intake

Just tried it with no luck. A couple weeks before this happened I noticed that I was losing power slowly. The day before my problems happened I stepped on it and it took off slow and sounded like I had a leak in my xhaust manifold but I don't.... just thinking now maybe my cat.

I have a appointment friday morning. I hope its a cheap fix. Just trying to figure out whhy it won't run after a hard reset from my battery.

Thanks a lot dsmuts. Il try that now

I brang it to the garage and was told that my brand new coil don't work it was #2&#5 coil that wasn't working. So I purchased a new coil and Ippurchased a new icm. My question is the icm I bought isn't a gm or ac delco replacement. I bought one from napa for half the price, was this a good idea? I kno sumtimes our cars don't like cheap products. Can I mess sumthing up by using cheap electronic parts

Its running perfect again. Got all my power back. Not sure if I messed up my cat driving it a short distance w raw fuel being dumped in but that's the problem. For anyone hvn these codes remember this. Its important to come back here and post your solution s....