2023 Toyota Corolla Engine Problems

Your car has a strong fuel smell inside the cabin, and the check fuel cap warning light came on within 100 miles of fueling. The check engine light also appeared the next day. A dealership performed diagnostic testing and found smoke leaking from the fuel tank area, so they replaced the fuel pump ring and an evap hose clip. After initial testing passed, the problem returned within 50 miles—the check engine light, fuel cap warning, and fuel odor all came back. The repair will likely involve replacing fuel system seals, hoses, or the fuel tank cap to stop the leak.

Your car displayed a maintenance message on the dashboard indicating engine service is needed. The dealer identified the issue as a faulty coolant bypass valve. This valve regulates coolant flow through your engine, and when it malfunctions, your engine may run hotter than normal or overheat. Replacing the coolant bypass valve should resolve the warning message.

Your engine's fuel injector failed, causing your engine to run too rich (too much fuel) and misfire, which made the car very difficult to drive. The check engine light came on when the problem started. The dealership confirmed this was the issue.

Your car occasionally fails to accelerate smoothly when pulling out in traffic, with the engine revving past 5,000 RPM but the vehicle barely moving forward. You may also experience jerking and hesitation at speeds between 0-30 mph, though releasing and reapplying the gas pedal temporarily resolves it. Interestingly, turning off the traction control seems to help. The issue appears to involve the engine's fuel delivery or ignition system and should be diagnosed by your Toyota dealer.

I got a message that the engine needs maintenance and I should go to the dealership and have the coolant bypass valve repaired. I see there's a lawsuit against Toyota for a manufacturing defect in that component on 2019-2023 Corollas. I'd like to know if I'll get a refund.