Vw Diesel Check Engine Light

One of the most common reasons for seeing the check engine light on a diesel truck is the aftertreatment system.

Vw diesel check engine light.

Typical diesel truck check engine issues aftertreatment system. When one of these sensors fails it sends a signal to the engine computer to illuminate the check engine light in the dash. Why is my volkswagen check engine light on. Diesel trucks have nitrogen oxide nox sensors that measure what your car is putting out into the environment.

Here are the 10 most common issues that trigger it. There are many reasons as to why it s on and they usually aren t a huge problem. References volkswagen golf gti 1999 2006 jetta 1999 2005 jetta wagon 2001 2006 city 2008 repair manual on dvd rom. The check engine light on your volkswagen jetta passat golf tiguan etc can come on for a number of reasons including defective mass airflow sensor bad thermostat engine temperature sensor short in main wire harness vacuum leak worn spark plugs and failed ignition coils.

Volkswagen vehicles built after 1996 are equipped with a system of sensors known as on board diagnostics obd ii. The red check engine light code. One thing that can really throw us for a loop is when the check engine light comes on in our vehicles. These sensors monitor many vital engine functions and help to lower harmful emissions.

By product expert posted in faq service center on wednesday march 16th 2016 at 7 51 pm causes and meaning of the vw check engine light. To learn how to periodically check the engine oil on your volkswagen and help maintain its performance watch this video. This yellow light when solid means the diesel engine pre flow system is switched on. 3 reasons why your volkswagen check engine light is on by product expert posted in tips and tricks vw service on friday july 14th 2017 at 4 13 pm.

If the check engine light comes back on after resetting it there is still a problem with your jetta that needs attention. In some ways the check engine light is the most obvious one to diagnose as far as which part it s pointing to as a problem.