Best thing to do is to hook it up to a scan tool to see what the ECM is reading. Low temp should be about -40 degrees. The ECM is seeing a sensor failure and substituting a default value.
Check the wiring to the CLT sensor and I would change it. If the sensor and wiring are good, it may be a bad ECM.
Friday, July 18th, 2008 AT 5:14 AM