New Delhi: Experiencing a faint petrol odour inside a car cabin is something many drivers tend to dismiss as a minor annoyance. However, automotive experts warn that ignoring this could be a grave mistake. A petrol smell wafting inside the car or through the AC vents is never a normal occurrence. It strongly points to a fuel system malfunction that can pose severe fire hazards and significant health risks to the occupants.
According to automotive specialists, one of the most common and easily fixable reasons for this issue is a loose fuel cap. Petrol evaporates rapidly, and if the cap isn’t securely clicked shut after a refill, the highly flammable vapour can easily seep into the cabin.
Another major culprit lies under the hood: deteriorating fuel lines and faulty injector seals. Over time, rubber components within the fuel system wear out and develop micro-cracks. When the engine heats up, petrol vapour escapes through these tears and is subsequently pulled into the cabin via the car’s ventilation or AC system. This is why the smell often becomes noticeable only after driving for a few minutes.
For older vehicles, rust forming around the fuel tank might cause vapour leaks, even if no liquid fuel is visibly dripping on the ground. Meanwhile, modern cars are equipped with an Evaporative Emission Control (EVAP) system designed to safely trap these vapours. If the system’s charcoal canister or valve fails, those trapped fumes can bypass the mechanism and infiltrate the interior.
The dangers of breathing in petrol fumes extend well beyond the immediate risk of a sudden fire. Prolonged inhalation can lead to severe headaches, nausea, and dizziness, significantly impairing a person’s driving ability.
Auto experts strongly advise that if a strong petrol smell is detected while driving, the driver must pull over to a safe location immediately and roll down all windows to ventilate the cabin. It is crucial not to restart the engine if the odour persists, as even a minor electrical spark could ignite the concentrated vapours. Drivers should visually inspect under the vehicle for any wet spots and immediately consult a trusted mechanic to thoroughly check the fuel cap, lines, and tank before resuming their journey.