Fuel Cap Service Video

A check engine light after a fill-up can be due to something simple. A loose fuel cap or worn rubber seal can let fuel vapor escape. When that happens, the car may think there is a leak in the EVAP system.

A faulty or loose fuel cap can trigger a check engine light by breaking the seal in the fuel system. The fuel cap seals the tank opening and helps keep fuel vapor inside the system. If the cap is cracked, loose, or cross-threaded, the seal may fail.

Springfield weather can be hard on rubber seals. Hot days, cold Ohio mornings, and temperature swings around I-70, US-40, and Limestone Street can make old caps dry out or crack over time. Drivers from Urbana and Mechanicsburg may visit our Springfield shop when the check engine light comes on after getting gas.

At Zima Automotive, we do not guess from the light alone. We check the fuel cap first because it is a simple place to start. If needed, we can scan the code and test the EVAP system to see if the leak is from the cap, hose, valve, or another part.

If your check engine light came on after a fill-up, call Zima Automotive at (937) 342-3911. Start with our fuel system repair service so the team can find the real cause. A Springfield auto shop can inspect the fuel cap before a loose seal, cracked cap, or pressure leak triggers warning lights or fuel system issues.