Ok so gf used jeep and came home said check engine light was on ran code it said running to lean (bank 1) Can anyone elaborate this for me on what needs changen lol

 

o2 sensor maybe? sometimes just a tune up can clear that up too.

 

o2 sensor thats right on the down pipe. bank 2 is the one after the cat if you have a 97+. easy fix but spendy little thing.

 

Dude thanks man thats what i was thinking it was going to be but when i saw running to lean i was like thinking its was going to be the fuel injectors or pump.

 

no prob just try to change it after its been warmed up so its easier to break loose.

 

 

Check for a vacuum leak and check fuel pressure before spending any cash on an O2 sensor.

 

this to yes, bank 1 just means the sensor is reading something wrong so it might now just be that. for me, the sensors dont like mud and water so after wheeling ill usually get a CEL haha

 

I'm having the same issue.

The P/O recently bought a new pre-cat O2 sensor, since receipt was in glove box. Disconnecting the battery, fixes it, but only temporarily.

The guy at the parts store put a code checker on it & it said it might be the wiring circuit for the pre-cat O2.

I'll tell ya, it does run better with the C/E light lit. It does get some pinging but only after a warm restart, & only for a block or two.