if the lights blink on the ECC panel, then it means there is a fault in the system, but you already know this. The temp sensors are located under the grab handles over the front doors, and there is one in the dash by the alarm LED i believe, you can clean the ones under the grab handles by removing the handles and cleaning the sensors with alcohol and Q-tips, the sensors actully have a tiny fan in them that causes the air to flow through the sensor, they get dirty and stop turning.

You can also try disconnecting the battery for about 15 minutes to clear the other codes out of the system. but you will need the security code for the stereo to turn it back on if you disconnect the battery.

hope this is of some help to you,

Dan