1994 Trooper SE 3.2L DOHC. I replaced my o2 sensor and reset the onboard computer but the sensor light still comes on. At low idle the RPM's fluctuate.

 

did you check for some loose wirings or something?.. have your mechanic
or someone check your
<a href="http://www.partstrain.com/ShopByDepartment/Oxygen_Sensor" target="_blank">oxygen
sensor</a>. im sure you'll figure it out. good luck..