The OBD2 (On-Board Diagnostics 2) port is a standardized connector typically located under the dashboard on the driver’s side. It allows you to connect diagnostic devices, such as an OBD2 scanner, to your vehicle’s computer.Using this port, you can read diagnostic trouble codes (DTCs), monitor live data (such as engine RPM, coolant temperature, fuel efficiency), and identify problems with your car’s engine or emissions system. It’s commonly used to diagnose the cause behind a “Check Engine” ligh

2.4K views · 39 reactions | [nonda Auto DIY Center] P0420 is the most common engine error code, it stands for catalyst system efficiency below threshold. Check out this self-repair video tutorial created by nonda's expert mechanics. Fix it yourself and save $$$ on your repair fees. Don't forget to claim your FREE ZUS Smart Vehicle Health Monitor here https://bit.ly/FreeZUS-ADC and get an in-depth diagnosis of your vehicle condition. | nonda | Facebook