O2 senso
 

:240: I just got a 1995 jeep yj went to get it ready for a etest when i found the o2 sensor was bypassed. Went and got a new o2 sensor jeep wont start. Will start if i bypass the o2. Also get codes 22,23,24 i dont know much about jeep.

Re: O2 senso
 

22 coolant temp sensor or circuit
23mat sensor or circuit
24throttle position sensor or circuit
if you get a good repair manual it will help you out Haynes repair manual is what I have covers 1987-2008 wranglers. hope this helps

Re: O2 senso
 

Could you describe in more detail how you bypass the o2. It sounds like you have a problem in the harness somewhere. Is it obd1 or 2?, either way the o2 being connected or not should not affect whether it starts or not.

Re: O2 senso
 

they have the wires from an 02 sensor .have the grey and white conected to each other i leave it on the jeep starts no problem i hook up the o2 sensor the jeep wont start.

Re: O2 senso
 

today looking at the jeep. i pulled the bypass wires off jeep stalled. put the bypass wires back on i could hear the full pump kick on if this helps anyone