On first start car idles high, then before car warms it shut down and cooling fan comes on for about 2 minutes while ignition is in the on position( engine light is not on). After fans turn off(engine light comes back on), then car starts and runs fine. Thermostat been changed, temp. Gauge does not work inside. Not sure how many and location for temp. Sensor. Also I have a code #55 from computer read not sure what the problem is for that code. This car was passed down to me after my moms death, so i'm commited to get it fix Help!