Join Date: Oct 2002
Location: Griffin, Georgia
Why did my "Service Engine Soon" light come on?
I started my car this morning, and my "low coolant" light came on. Which isn't abnormal. I have to top it off (in the COLD weather) once a month, or so. Anyway, after about 5 minutes of driving the car, my "Service Engine Soon" light clicked on. I pulled over at a Gas Station and checked my oil. Other than looking a little dirty, I had plenty of oil. So "no oil" wasn't the case. Keeping in mind that I haven't done an oil change in about 3-4 thousand miles. Could that be the problem? This light has never clicked on before, and I have gone 4-5 thousand miles without changing my oil.
Something else that it might be, is my 180 T-stat that I have installed. Ever since I put this T-stat in, my engine temp gauge never goes horizontal (in cold weather). It takes my car about 25 minutes to heat up, so that I can even have heat, sometimes longer. If the T-stat was stuck open, or closed, would that throw the "service engine soon" light?
Is bad gas mileage a sign of blown head gaskets? I get terrible gas milage, and was just curious.