On-Board computer Error Code
Thread Starter
Drifting
Joined: Jul 2005
Posts: 1,891
Likes: 2
From: Baltimore MD
On-Board computer Error Code
Drove the 95 to work this morning bacause if finally was a great sunny day here in Maryland. I noticed it was ideling a little rough and then the "Service Engine Soon" light came on in the DIC. Well I hooked it up to the diagnostic unit when I got home and it came back with an Error Code of "44" Left Bank Oxygen Sensor Lean. What the heck does that mean? Anybody got a clue. Last fall I installed a brand new Magna Flow Cat Back system and a new High flow Catalytic converter. I know the mechanic had to install a bong for the oxygen sensor for the catalytic converter, where is the left bank sensor located? Let me guess I gotta lift the car to find it, right?
Burning Brakes
Joined: Nov 2005
Posts: 848
Likes: 1
From: 1992 LT1 6 speed Cayman Islands
In the left exhaust below the manifold. You can see it better from under the car, however do not change it as the O2 is likely not the problem, it is just the sensor that reports the problem to the ECM. You need to troubleshoot it and find out why it is throwing that code.
As CFI-EFI always says ....... Dont shoot the messenger.
As CFI-EFI always says ....... Dont shoot the messenger.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
This sort of problem happened to me. My 95 ran good one day and the next the check engine light came on and it idled rough. You could drive it but it would blow black smoke out of the left muffler when I gave it throttle. Checked it on a diagnostic tool and it said bad o2 sensor on the left. I replaced the O2 sensor just under the left exhaust manifold and it ran like a top. Mabe this will help ya. 
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
Originally Posted by Jerris
You need to troubleshoot it and find out why it is throwing that code.
Thread Starter
Drifting
Joined: Jul 2005
Posts: 1,891
Likes: 2
From: Baltimore MD
Originally Posted by Jerris
In the left exhaust below the manifold. You can see it better from under the car, however do not change it as the O2 is likely not the problem, it is just the sensor that reports the problem to the ECM. You need to troubleshoot it and find out why it is throwing that code.
As CFI-EFI always says ....... Dont shoot the messenger.
As CFI-EFI always says ....... Dont shoot the messenger.
Burning Brakes
Joined: Nov 2005
Posts: 848
Likes: 1
From: 1992 LT1 6 speed Cayman Islands
Originally Posted by IrishJoker
What do you suggest I check?
If the left ones are indicating a lean condition, look for a vacium leak or exhaust leak on the left side of the engine and correct.
If they are the same as those on the right and not showing lean condition I suspect you have a bad O2 sensor.
Do this test first to see if there is indeed a lean condition on the left side of your engine and correct it if there is before simply changing the O2 sensor.
Hope this helps.
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Thread Starter
Drifting
Joined: Jul 2005
Posts: 1,891
Likes: 2
From: Baltimore MD
Not yet - I moved the 95 out to the drive way and covered it during the winter while I was restoring my 81. I bought a brand new cover to protect it while it was parked . By the condition of that new cover, it appears some critter has been nawing on it. Holes everywhere. I suspect some squirrles decided my cover would make nice nest material. So I am wondering if they decided to naw on a few other things under the hood. I will begin a detailed check of the engine compartment, nawed vaccuum and wires this weekend. If I can't find anything a new oxygen sensor is about $59.00 at Advance Auto.
