Can a Loose o r Faulty Fuel Cap Trigger the Check Engine Light in a Toyota Camry?

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Can a Loose o r Faulty Fuel Cap Trigger the Check Engine Light in a Toyota Camry?

Many Camry owners in Pakistan have reported seeing the Check Engine Light CEL illuminate due to a loose o r cracked fuel cap. The vehicle’s Evaporative Emission Control System EVAP detects leaks in the system, and a faulty cap can trigger a warning code. Have Pakistani owners encountered this issue, and how do they confirm that the fuel cap is the cause?

Lubaba asked on 18 Feb 2025 16:52:38 pm

1 Answer

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Car Mechanic Expert - on 18 Feb 2025 17:01:14 pm

Yes, a loose o r faulty fuel cap can trigger the Check Engine Light CEL in a Toyota Camry. This happens because the vehicle’s Evaporative Emission Control System EVAP detects leaks in the fuel system. A fuel cap that isnt properly sealed o r has cracks can cause the system to register a leak, triggering a diagnostic trouble code DTC and turning on the CEL. Many Camry owners in Pakistan have faced this issue, and they typically confirm whether the fuel cap is the cause by tightening it o r replacing it to see if the light turns off.