TJ Engine Problems (Bad O2 Sensor?) [Archive]

Travis Waldher

08-26-2002, 10:04 PM

Rough running engine from time to time. I am suspecting the O2 sensors, it has 121,000 miles on the 2.5L the O2 sensors are stock.

Is it both or one. I plugged in my scan tool and got the following:

O2 Sensor 2, Bank1, .4v-1.1v, fluctuating constantly, changing every 3/4 of a second or so. changing to any voltage between about .4 and 1.1v.

With the key in the off or on position, engine off it reads 1.0v

O2 Sensor 1, Bank1, .1v-.9v, fluctuating constantly, changing every 3/4 of a second or so. changing to any voltage between about .8 and .9v.

With the key in the off or on position, engine off it reads .660v.

Anyone?

withamc

08-26-2002, 10:09 PM

Considering thy're "supposed" to be replaced at 85,000 miles, I'd say yes. Mine died right about there anyway. Really rough idle, stalled occassionally. Autozone has 'em pretty cheap.


Pirate4x4.Com > General Tech > General 4x4 Discussion > TJ Engine Problems (Bad O2 Sensor?) PDA : TJ Engine Problems (Bad O2 Sensor?) Travis Waldher 08-26-2002, 10:04 PM Rough running engine from time to time. I am suspecting the O2 sensors, it has 121,000 miles on the 2.5L the O2 sensors are stock. Is it both or one. I plugged in my scan tool and got the following: O2 Sensor 2, Bank1, .4v-1.1v, fluctuating constantly, changing every 3/4 of a second or so. changing to any voltage between about .4 and 1.1v. With the key in the off or on position, engine off it reads 1.0v O2 Sensor 1, Bank1, .1v-.9v, fluctuating constantly, changing every 3/4 of a second or so. changing to any voltage between about .8 and .9v. With the key in the off or on position, engine off it reads .660v. Anyone? Old Scout 08-26-2002, 10:07 PM At 121K who cares what there doing , they need to go! withamc 08-26-2002, 10:09 PM Considering thy're "supposed" to be replaced at 85,000 miles, I'd say yes. Mine died right about there anyway. Really rough idle, stalled occassionally. Autozone has 'em pretty cheap.