NCT relevantEngine warning light
The engine management system has detected a fault that may affect running, emissions, or fuel use.
May affect NCT if the fault causes emissions, running, or visible smoke issues.Warning lights
Dashboard warning lights before your NCT
A quick preview guide to common warning-light issues. These pages explain likely next steps and then hand you back into the existing FixMyNCT part workflow.
NCT relevantCheck this issue
NCT relevantEmissions warning
The car may be struggling to control exhaust emissions or fuel combustion correctly.
Likely NCT relevant because emissions are directly tested.
Lower urgencyBattery warning light
The battery may not be charging properly, or the charging system may be weak.
May affect NCT if lighting, starting, or electrical systems are unreliable.
UrgentBrake warning light
The brake system may need attention, commonly from worn pads, low fluid, or a brake sensor warning.
Likely NCT relevant because brake performance and wear are safety-critical checks.
NCT relevantABS warning light
The anti-lock braking system may not be working correctly.
Likely NCT relevant if braking assistance or warning indicators are faulty.
NCT relevantTyre pressure warning
One or more tyres may be underinflated, damaged, or wearing unevenly.
Likely NCT relevant if tyres are worn, damaged, or below legal tread depth.
NCT relevantSteering warning light
The steering assistance or steering linkage may need attention.
Likely NCT relevant if steering play or steering components are worn.
NCT relevantSuspension warning
Suspension, ride-height, or damping components may be worn or faulty.
Likely NCT relevant if suspension components are worn, loose, leaking, or damaged.
NCT relevantBulb warning light
An exterior bulb may have failed or a lighting circuit may need attention.
Likely NCT relevant because exterior lighting faults can fail inspection.
Lower urgencyOil or service warning
The car may be due an oil service, or oil condition or level may need attention.
May affect NCT if poor servicing contributes to smoke, emissions, or visible leaks.Warning lights do not provide an exact diagnosis. If a warning is red, flashing, or changes how the car drives, arrange a mechanic or diagnostic check before continuing.