Vw Diesel Check Engine Light

Volkswagen vehicles built after 1996 are equipped with a system of sensors known as on board diagnostics obd ii.

Vw diesel check engine light. 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. Why is my volkswagen check engine light on. This yellow light when solid means the diesel engine pre flow system is switched on. The orange check engine light is a car s way of telling you something is wrong.

To learn how to periodically check the engine oil on your volkswagen and help maintain its performance watch this video. Diesel trucks have nitrogen oxide nox sensors that measure what your car is putting out into the environment. These sensors monitor many vital engine functions and help to lower harmful emissions. There are many reasons as to why it s on and they usually aren t a huge problem.

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. 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. When one of these sensors fails it sends a signal to the engine computer to illuminate the check engine light in the dash. If flashing this warning light means a malfunction has occurred in the diesel engine.

The red check engine light code. One of the most common reasons for seeing the check engine light on a diesel truck is the aftertreatment system. If the check engine light comes back on after resetting it there is still a problem with your jetta that needs attention. Here are the 10 most common issues that trigger it.

Typical diesel truck check engine issues aftertreatment system. One thing that can really throw us for a loop is when the check engine light comes on in our vehicles.