There are a number of things that can cause the emissions workshop warning light to come on, including:
- A faulty oxygen sensor
- A catalytic converter failure
- A problem with the EGR (exhaust gas recirculation) valve
- A boost leak in the turbo system
- DPF or Diesel Particulate Filter is filled
If the emissions workshop warning light comes on, it is important to have the car inspected by a qualified mechanic as soon as possible. Driving with a malfunctioning emission control system can damage the car's engine and increase its emissions.
In some cases, it may not be possible for service people to remove the emissions workshop warning light because the problem is with the car's software. In these cases, the car may need to be taken to a dealer for repairs.
