What causes exhaust emissions light to come on?

What causes exhaust emissions light to come on?

Most of the time, when an Emissions Light comes on, it is due to either a sensor or a problem with the exhaust gas recirculation valve. It is also possible that you have a vacuum hose that has become disconnected, or has developed cracks.

What does emissions are deteriorating mean?

Background As used here, the term “deterioration” refers to the degradation of an engine’s exhaust emissions performance over its lifetime due to normal use or misuse (i.e., tampering or neglect).

How does the BMW E46 exhaust emission valve warning light work?

Each BMW E46 is equipped with an internal computer that monitors a variety of aspects of the engine system. When the computer detects a potential problem concerning the vehicle’s emission and exhaust system, the exhaust emission valve warning light will be illuminated on the instrument cluster.

What does the warning light on my BMW 318 mean?

Sorry mate. Its a bmw 318 2002. The warning light is like engine shaped and the manual refers to as vehicle emission deterioration asking me refer to bmw dealer. The car is running fine as just two weeks ago the same light had appeared in dashboard and there was no power at all in car.

What is the BMW E46 computer?

The BMW E46 is another name for the 3-Series vehicles produced between 1999 and 2005. Each BMW E46 is equipped with an internal computer that monitors a variety of aspects of the engine system. Open the bonnet. Prop the bonnet open with the retaining bar.

Where is the diagnostic port on a BMW E46?

Each BMW E46 is equipped with an internal computer that monitors a variety of aspects of the engine system. Open the bonnet. Prop the bonnet open with the retaining bar. Twist off the cap of the diagnostic port, located in the engine compartment below the windshield on the passenger’s side.