Dashboard warning light
Emissions warning
NCT relevantThe car may be struggling to control exhaust emissions or fuel combustion correctly.
This warning commonly points to emissions, smoke, lambda or a related system fault, but the exact cause depends on the vehicle, symptoms, and stored fault context. If your NCT is due soon, it is worth checking because issues around safety, emissions, lighting, or fitment can affect the test. Choose your vehicle below to see relevant parts such as oxygen sensor, air filter, catalytic converter, lambda sensor, then compare offers using the existing FixMyNCT parts flow.
Want to know the exact fault code?
A Bluetooth OBD2 scanner can read engine and emissions fault codes from your phone before you buy parts or book a garage.
Next step
Check parts for this warning light
Choose a vehicle first, then select a related part to show offers on this page.