Volkswagen Touareg P0421 Code: Meaning, Causes, How to Fix

P0421 is a relatively rare OBDII trouble code.   It’s generic, which means it has the same definition for the Volkswagen Touareg as it would any other vehicle. It is technically defined as “Warm Up Catalyst Efficiency → Below Threshold (Bank 1)”. In layman’s terms, it indicates that your Volkswagen Touareg’s catalytic converter is not scrubbing pollutants efficiently … Read more

Volkswagen Touareg P0316: Engine Misfire → At Startup

A relatively common, yet difficult to diagnose OBD-II trouble code is P0316. It has the same meaning for the Volkswagen Touareg as it would any other vehicle.  It indicates that there is a misfire at the startup of the vehicle, and that it happens within the first 1000 revolutions of the engine. P0316: Engine Misfire … Read more