URD Rear O2 Simulator, 2UZ-FE 4.7L V8 2000-2004, Dual Channel

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Many people using their Toyota trucks in sanctioned off-road racing or rally events install an aftermarket high flow catalytic converter for added performance. Some of these aftermarket high flow units seem to flow like there is no catalytic converter at all. These high flow cats or (off road) lack of a cat may cause that annoying check engine light to activate. Our rear O2 sensor simulator is a device that conditions the signal from the rear O2 sensor and keeps that signal in the proper range the ECU is expecting to see from a properly functioning and healthy catalytic converter. Our device takes a slightly different approach than most of the other devices on the market. It is designed to work with the O2 sensor that is installed down stream of the catalytic converter. It does not replace it. The rear O2 sensor must remain in contact with the exhaust stream. This way the vehicle will looks stock. If you do a diagnostic hook up, you will see a proper signal from the rear O2 sensor. The device is very small and there is a very simple three-wire hook up. The wire carrying the signal from the rear O2 sensor is located and cut. That wire is run through the device and then there is a single wire that needs to be connected to ground. It is about the size of a small box of matches and is best installed in the dash near the ECU.

This device may not be legal for use on pollution-controlled vehicles operated on public roads and is intended for off-road use only.