Toyota Corolla Check Engine Light – Fuel Cap Issue?

Home > Gari Forums > Toyota Forums > Toyota Corolla Forums > Toyota Corolla Cracked o r Loose Fuel Cap Forums

Toyota Corolla Check Engine Light – Fuel Cap Issue?

Hi all,

I’ve been getting the Check Engine light on my Toyota Corolla, and the code is pointing to a fuel cap issue. I’ve checked the cap, and it seems tight, but the light won’t go off.

Could this be a more serious issue with the fuel system, o r is the fuel cap likely the problem? Any tips on how to reset the code?

Thanks for the help!

Sandeep asked on 29 Jan 2025 16:36:47 pm

1 Answer

20 views |

Car Mechanic Expert - on 29 Jan 2025 16:43:20 pm

It’s possible that the fuel cap is the issue, even if it appears tight. Sometimes the seal on the cap can wear out o r become damaged, causing the Check Engine light to trigger. Even if the cap feels secure, it might not be sealing properly, which can lead to an EVAP system leak o r trigger other emissions-related codes.

To rule out the fuel cap issue, try replacing it with a new one. If the problem persists after replacing it, there could be a deeper issue with the EVAP system o r another part of the fuel system, such as a faulty sensor o r hose.

As for resetting the code, you can try disconnecting the car’s battery for about 10 minutes, which can sometimes reset the system. Alternatively, an OBD-II scanner can be used to clear the code after fixing the issue.

If the code remains after replacing the cap and resetting it, you might want to take it to a mechanic for further diagnosis to ensure there isnt a more serious problem with the fuel system o r sensors.