Catalytic converters create a substantial obstruction in the exhaust flow of all modern production vehicles. Removing it on an off-road performance automobile is a good way to create a freer flowing exhaust and increase horsepower.

Unfortunately, doing so usually prompts the engine control unit (ECU) to activate an annoying check engine light. The ECU checks for the presence of the catalytic converter through one of the vehicle’s oxygen (O2) sensors. SymTech’s Intelligent O2 Sensor Simulator unconditionally produces an accurate sine wave signal similar to that of an O2 sensor if the catalytic converter were there, while dissipating the current allotted for the sensor’s heater element. By using this simulator, you will avoid the check engine light altogether.

Units are pre-tuned, but user-configurable, to match any zirconia O2 sensor signal. They're coated with protective polyurethane and come ready to be hardwired into the O2 sensor’s wiring harness.

We can also pre-wire the simulator for simple plug-and-play installation. You must send us the original O2 sensor for the plug-and-play configuration.