I dont know but my O2 sensors are less then 4 months old and it did this after i had them for a month

 

Have you given the o2 sensor wiring a good inspection yet? It sure sounds like you have a short. If those wires short (and making a turn may be enough to do it) it will screw up voltage to all your other sensors. It's entirely likely your engine will jerk and buck and trans will shift badly until the fuse blows and isolates the short. Those fuses blowing and O2 codes are pointing you to the problem. Look at that wiring.

 

yeah i have but one is universal where i used the original plug and wire it in to the O2 sensor. But the other one is the correct one for my jeep could that cause the short? it sounds like i should just replace the universal one with the correct one for my jeep.

(this is a link to the sensor im talking about. http://www.autozone.com/autozone/par...66_16521_97999)

 

Radi I replaced my upstream O2 sensor and replaced the fuse and the CEL has turned off and is running great. thanks for all the help.

 

The 7-8 fuse in the PDC is the O2S heaters fuse.

The only thing the O2S heaters and the TCM have in common is their grounding point. They both ground at G101 on the engine. See pic.

However, both the O2S heaters power wire from the O2S heaters fuse and the TCM ground wire goes through connector C107. C107 is located in the group of three connectors next to the tranny dipstick tube. The O2S heaters power wire may be shorting to the TCM ground wire. The other connectors are the Transmission Range Sensor (NSS) and the Transmission Control Assembly (solenoids). Both of these go to the TCM.

Try moving the harness around that comes off C107 and goes into the harness loom on the firewall. Renew the O2S heater fuse, and start the Jeep, see if the fuse blows. This where I suspect there's a gremlin.

A starting point anyway.

 

Dang, a day late and a dollar short again. You guys are too fast for me to keep up.

Glad you got it fixed, but I still can't figure out how changing an O2S fixed it, with the TCM going nuts and all. Can someone explain how that worked...

 

Dunno. The old O2 sensor was a 'universal', what would happen if it were miswired?

 

Yeah I hae no clue how the were related. But the wiring in the 97's is just awful.

 

So it came on again but after i went mudding and went through some pretty deep water I think if i remove my O2 sensors and clean them it will shut off. but what should i clean them with?