Why Does the Peugeot Engine Warning Light Turn On?

What does the engine warning light mean? The yellow or orange engine symbol on Peugeot dashboards indicates that the engine management system has detected a fault. This may range from a minor sensor issue to a more serious mechanical problem.

Common causes

• Oxygen (Lambda) sensor malfunction
• Clogged EGR (Exhaust Gas Recirculation) valve
• Inefficient catalytic converter
• Faulty spark plugs or ignition coils
• Incorrect air-fuel mixture
• Poor fuel quality

What to do? Don’t panic if the engine light turns on. Observe if there’s loss of power, rough idling, or increased fuel consumption. If the light flashes, it indicates a severe misfire and you should stop the vehicle immediately.

With an OBD scanner, the specific error code can be read to determine the exact cause. In some cases, the warning may disappear after a few restarts if it was a temporary sensor glitch. However, if it stays on, a diagnostic check at a qualified workshop is essential.

Tip: Following regular maintenance schedules and using quality fuel and oil will prevent most warning light issues from reoccurring.