Where is the fuse for o2 sensor heater curcuit fuse in a 05 wrangler 4.0 l

Question edited for clarity.
Question moved to model category.

This Club Lexus thread may help you.

O2 sensor heater control circuit fuse? - Lexus Forum Discussion

https://www.clublexus.com > forums > 951271-o2-sens...
Aug 27, 2020 - I looked up in the manual and I didn't see a fuse dedicated to O2 sensors heaters. One of the possibilities is the resistor in the sensor ...
FUSE help o2 sensors? - ClubLexus - Lexus Forum Discussion
Dec 2, 2007
New oxygen sensor reading 0 voltages - ClubLexus
Aug 17, 2015
O2 Sensor problem FINALLY SOLVED!!!!!!!!! - ClubLexus
Nov 28, 2002
EFI fuse 2 keep blowing - ClubLexus - Lexus Forum Discussion
Jul 29, 2020
More results from www.clublexus.com

https://www.google.com/search?q=2004+lexus+sc430+heated+oxygen+sensor+fuse

..

Replace that o2 sensor and reset light see if returns most likely a bad heater in o2 sensor

Sounds like the heater in one of the O2 sensors is not working. But you would need to know which sensor to troubleshoot it.

either bad o2 sensor or damage -short in wiring harness and or connector the 02 sensor is the one after the cat converter

If the oxygen sensors on the vehicle are faulty then that could easily cause the poor fuel economy. Replace both of the O2 sensors and clear the code with a scan tool. You should start getting better fuel economy. I hope this was helpful.

That code is related to an oxygen sensor failure (or wiring problem) Many times though the code is set by the sensor not because it has failed but because it is reading a mixture in the exhaust that is beyond its ability to read. Therefore, to avoid replacing the sensor and still having the same problem when you are finished it is essential that you check the remainder of the system paying close attentions to somewhat out of range items which aren't bad enough to set a code, but together, throw the control system off enough to cause a problem. Not only sensors need testing but the ignition coil, plug condition and vacuum system/vapor recovery need to be right in order for everything to be working correctly.(pretty much anything that can change how well the fuel is being used in the engine) I know it takes time and patience to do all this but that is what any competent shop will do so you are not back there the next day!!! Most testing can be done using a digital multi-meter and a haynes or chiltons manual as a guide reference. And of course, before you begin, do check the values of the O2 sensor as well.

bank 1 sensor 2 is the left downstream sensor (1/2) is located in the exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. Now the meaning of this is that your not getting any 12+/12- heating on sensor, which means voltage is supplied to heat sensor up. You have a O2 sensor heater relay, but not getting problem with 2/2 sensor tells me you need to check/inspect the wiring for 1/2 sensor, open wiring for 1/2 sensor and inspect

Here it goes.
P2197 - Front Air Fuel Sensor (O2 sensor) Bank 2 - Sensor 1 Signal stuck lean.

P0154 - Front Air Fuel Sensor (O2 Sensor) Bank 2 - Sensor 1 Heater System Malfunction.

P2254 - Front AIr Fuel Sensor (O2 Sensor) VS Line high voltage.

IF Trouble codes P0134 or P0154 are present diagnose them before code P2254.

The first thing I would do would be check the heater circuit. You will have ground, and 12V+ to the 02 sensor heater line on a cold start. This heats up the oxygen quicker and allows it to operate in the correct amount of time. 9/10 times if there is a heater circuit code it is the oxygen sensor. But 1/10 times it is a blown fuse. So checking the voltage at the sensor is a quick test for P0154.

I would backprobe the signal line when the vehicle is at a full operating temp with a graphing meter (if avail) or use a DVOM. You should see it switch between .1 volts to 1V. It should not continuously move up and down. This indicates the computer is in good fuel control.

Diaginosis the heater circuit first is best because code P2197 can be set from anything that can cause that motor to run lean. (Plugged fuel filter, low fuel pressure/volume, vacume leak).

Hope this gives you a solid path to go on & good luck.

there is a fuse for the o2 heaters if one of the sensors blew the fuse they will all be out