Hello O2 sensor adapter for lead knob replacement Adapter installed on the O2 sensor Improves sensor reading as if the lead knob is present In case the lead knob is damaged, emptied, or modified The engine light (Check Engine) will illuminate If the engine light (Check Engine) appears, scan the computer and confirm the error code you have P0420,P0421,P0422,P0423,P0424 P0430,P0431,P0432,P0433,P0434 Due to the appearance of the engine light (Check Engine), these problems occur: 1- Very high fuel consumption 2- Delay in starting 3- Loss of torque 4- Vibration, hesitation, and stuttering 5- Remote start disabled 6- Traction control disabled 7- 4WD disabled The adapter improves the sensor reading to turn off the engine light (Check Engine) and resolve these issues Price 70 SAR straight type And L-shaped type price 110