why does my engine light come on

When the engine light pops on, your car isn’t being dramatic—it’s politely suggesting you use a scan tool.

Common culprits include:

• Loose or faulty fuel cap causing EVAP leaks
• Oxygen or mass‑airflow sensors going out of whack
• Worn spark plugs/ignition coils leading to misfires
• EGR or catalytic converter efficiency faults
• Low voltage, tired battery, or wiring gremlins

Get the OBD‑II codes read; plenty of Aussie workshops and parts stores can do it quickly.

If the light is flashing, ease off and treat it as urgent—unburnt fuel can cook the cat, and replacements aren’t cheap in AUD.

Deal with it sooner and you’ll likely save money, fuel, and your sanity.