Oxygen sensors in cars determine gas oxygen content, triggering the Check Engine Light. Drivers often wonder how to trick these sensors to illuminate the Light, but step-by-step instructions are provided for this purpose.
How to Bypass Oxygen Sensors?
Fake oxygen sensor can be used to bypass an oxygen sensor, but it may be illegal or affect vehicle performance, but it’s easy to do.
1.Prepare the Car
To avoid hot car exhaust, wait for it to cool before starting work. Disconnect negative battery cable from the terminal by loosening the clamp.
2.Lift Vehicle
To increase workspace, jack up your car using the front jack point, place jack stands underneath the front end frame, and gradually lower the car on the stands.
3.Disconnect O2 Sensor
Remove the O2 sensor, a plug in the exhaust system, either in the catalytic converter or both. Carefully unplug the sensor’s wiring and squeeze it to release it.
4. Insert Dummy O2 Sensor
Install a new O2 sensor simulator, lower vehicle, and check Engine Light. Turn off Check Engine Light, but note fake sensor installation may be prohibited in some areas
Is it worthwhile?
A dummy oxygen sensor can be used to modify engine tuning or turn off the Check Engine Light when emissions are off. A simple simulator is needed for the first sensor before the catalytic converter, while a special adapter is needed for the second sensor behind the catalytic converter. However, local laws may vary, and the oxygen sensor, which regulates fuel and air mixture, should not be removed.
Conclusion
A fake oxygen sensor or resistor can bypass an oxygen sensor in a car, but it may be prohibited in certain regions. To clear the P0420 code, bypass the downstream oxygen sensor, which doesn’t affect engine performance but requires reprogramming the ECU to turn off the check engine light.