My engine light came on..took it to Auto Zone. The guy gave me a full detailed on which o2 sensor. which was Bank 1 Sensor 1. So I disconnected my negative to my battery and replaced the sensor. I drove it for about an hour, and it came back on. Someone told me resetting the code might do the job. And then I hear that just bc it says o2 sensor it might be something else. I have to get it fixed bc I gotta get my inspection done. So any advice tips or anything would be great. My truck is a 2006 f.150. XLT 5.4. It also shakes on occasion when imy idling, and it blows alot of exhaust.

 

had a similar issue. it was a leak at the manifold caused by loosed bolts.
maybe this helps...

 

It could be your Catalytic Converters.

 

What was the specific code?

 

Lewissa81. I don't remember what it said, when I went and bought the replacement sensor. The guy threw my paper away.
I'll check my manifold and catalytic. Thanks for yalls info!! Hopefully I can fix it.

 

Auto zone always says it is an O2 sensor. I bet if you went back or to a different store they would try selling you another one.

 

I don't doubt that the code came from the O2 sensor, but as mentioned, it was only being reported that this O2 sensor detected a lean mixture. This would not indicate a bad O2; simply that it saw a lean mixture, and reported it.

You need to identify what is causing a lean mixture. The parts guys offer free diagnostic checks with their hand held code readers, but in no way are they mechanics. They sell parts.

Some searching as to what can cause a lean mixture is next. Having the code itself is the best, as you can simply enter this code in the Google search box, and obtain a wealth of information about it.

Vacuum leaks, intake leaks (too much air), or plugged/weak fuel injector(s) can be a source of a lean mixtures.

But don't just toss parts at it; sooner or later you'll fix it, but at a large expense. In your case, you need to get it solved quickly to get it to pass testing. It may be best to get it properly diagnosed and repaired by a reputable repair shop.

 

Let us know what the code is/was to make a more informed guess. It does sound a lot like a vacuum leak.

 

so I got it checked again. They gave me 3 codes, but the third one is just stating about the battery being disconnected. So the other two codes is p2195 and the other is p0053.

 

Given the p0053 code, since you've already replaced the O2 sensor, I would check the wires first.
Just to be sure, bank 1 is the passenger side. Sensor 1 is up by the manifold, not directly beneath the truck