Rear Sensor Simulator
Originally Posted by magil23
Got a few questions on the URD
Rear O2 Simulator.. I have a 01 tacoma 4x4.. 2.4l.. Will this eliminate the 02 sensor's readings..? so say i have a bad front 02 sensor... by installing this in the rear sensor will it clear the check engine light? I use my truck for off road use only and my cats are cleared out.
Rear O2 Sensor Simulators are used in off road/racing vehicles to prevent the check engine light from illuminating and to prevent an ECU code from tripping. URD Rear O2 Sensor Simulators are carefully calibrated to condition the signal from the rear O2 sensor to keep it in the range the ECU is expecting to see. DO NOT USE ON A PUBLIC ROAD OR HIGHWAY ANYWHERE IN THE UNITED STATES.
Note: Be cautious of O2 sims that replace the rear O2 sensor with a falsely gererated signal.
Toyota started using a wideband type O2 sensor (air/fuel ratio) in the front position for better engine control. These wideband type sensors need to be recalibrated from time to time by the ECU. The ECU uses the rear sensors for this recalibration process. The ECU cannot properly recalibrate the wideband sensor using a falsely generated signal. This process is explained here, US Patent 5706654.
Use only a URD O2 Sensor Simulator on these vehicles to avoid poor performance, drivability issues and poor MPG.
Most of our customers are using their vehicles for dual use. During the week they use them for commuting and on the weekends use them for off road use and sanctioned racing events. Most of the URD Rear O2 Sensor Simulators can be very quickly plugged in for your off road events and then quickly removed for on highway use.