Fuel Smell From The Car
A smell of petrol or diesel can come from a loose fuel cap or an evaporative system leak, but also from a leaking fuel line, which is a fire risk.
High risk
A strong fuel smell, especially inside the car, needs immediate checking. Do not smoke or use open flames.
Short answer · Is it dangerous if my car smells of fuel?
A faint smell right after refuelling can be normal. A strong or lasting smell, a smell inside the cabin, or visible drips needs checking straight away, because leaking fuel can catch fire. Check the fuel cap first, then look for wet spots under the car.
Safe checks you can do
- Check the fuel capMake sure it is present, closed until it clicks and the seal is intact.
- Look under the carWet patches or drips along the fuel lines or under the tank.If fuel is dripping, do not start the engine.
- Note when you smell itOnly after refuelling, when cold-starting, or all the time.
Questions that narrow it down
- Is the smell inside the cabin?Needs immediate checking.
- Is the check engine light on?EVAP or rich mixture codes point to the cause.
- Is fuel consumption higher than usual?Can mean a leak or a rich mixture.
Possible causes
Listed without ranking. Use the questions above to see which ones fit your car.
- Loose or faulty fuel capVapour escapes from the filler.
- Evaporative system leakCracked hoses or a faulty valve.
- Leaking fuel line or injector sealFire risk; needs immediate repair.
- Rich mixture or misfireUnburnt fuel in the exhaust.
- Overfilling the tankFuel enters the vapour system.
Questions about Fuel Smell From The Car
Is a fuel smell after refuelling normal?
A faint smell for a short time can be. It should disappear soon after you drive off.
Can a fuel smell make me ill?
Fuel vapour can cause headaches and nausea. Ventilate the car and have it checked.