2.5K views · 40 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

[nonda Auto DIY Center] P0171 is one of the most common engine error codes, it stands for [System too Lean (Bank1)]. It indicates one of your bank has too much air and not enough fuel. 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/FreeZUSOBD and get an in-depth diagnosis of your vehicle condition. Don't forget to follow us, more a