So my Trans am is riding a bit rough again after battery disconnect and the ses light is giving me code 12. Not sure. After a while idle is fine and drives fine. 305 tpi

Edit lots of code 12s and one code 44

 

Code 12 is just what they call a handshake signal, witch confirms that you are in diagnostic mode, and cold 44 means "lean exhaust" which could bad ecm connections, bad fuel pressure or water in the fuel.

 

I had gone ahead and bought a new oxygen sensor because it is broken lol

 

Wondering if anyone knows the best way to replace this o2 sensor? Having a rough time getting my socket and bar on it

 

So an hour of frustration later lol..

I have a socket set for the oxygen sensor. As well as a huge breaker bar and an adapter for the bar and socket. I cannot get it in there. Every e says it's a ten minute job but I can find guides lol..

The socket is on it. I can't fit the bar and adapter onto it because it hit the sparkplug wire and a steel brake line I believe. It's becoming annoying lol.

 

I use a BIG offset box end wrench. and pb blaster. but youre right ,too much junk in the way to use the socket.

 

Well after I finally had it installed still ran tough with code 44 after reset. So I got some maf cleaner and sprayed everything down again. When I sprayed the pcv hose it idled up high. Is there a fault in the pcv hose? And if so how would I go about replacing it

 

lol! I just had the exact same issue.. ran rough after code 44. I believe the reason it runs rough with that code is because the computer sets to "default" air/fuel mixture causing the engine to run rich.

I Replaced the O2 sensor last night and it took me about 3 hours. I used two 4" socket extensions and the o2 sensor socket from O'rileys they rent.. Drove about 25 miles so far and no code and it runs great...

However, when I was replacing the sensor I noticed that the "bad" sensor wire was wrapped around one of my spark plug wires. Does anyone think that may be what killed it?

Good Luck!

 

yes, the FSM clearly states " keep the o2 sensor wire away from the spark plug wires".

 

FINALLY FIXED. After much hair pulling and off and on lean condition I found the issue.

A vacuum hose on the canister to the intake snuck by me. The hose looked way new and too big so I assumed I did it. After an inspection tonight I found it was one piece connected to another peice connected to an even smaller in length but bigger hose through a connection. And that hose on the intake was split and held together with electrical tape. Go figure. I've learned to double check now

 

Wow, nice. I had a similar thing happen; same hose, only it had gotten melted.

 

Good to see you've found the problem, for anyone else with a tricky Code 44, replacing the EGR fixed mine

 

I use a box end wrench. it solves all that "cant get the tool in there" buisness