Check Engine Light is On

Asked by allier88 Apr 29, 2020 at 12:50 PM about the 2008 Hyundai Accent L Sedan FWD

Question type: Maintenance & Repair

My check engine light is on, and the temperature guage is showing below the
middle line, towards the "cold" side. My car isnt making any noises or running
badly. What could be the problem?

1 Answer
157,615

James answered 4 years ago

I'd suspect the thermostat is stuck open and needs to be replaced. On a modern vehicle the engine needs to reach normal operating temperature, usually 195°F, within a certain amount of time from a cold start up. The time limit is usually 10 minutes. If that doesn't happen the check engine light will come on and a trouble code will be stored in the computer. With the temperature gauge reading low I'm suspecting that's what it is. Visit your local auto parts store and have them scan the computer for trouble codes to confirm this. Most stores will do it for free! Hope that helps! Jim

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