Are you geting a PO128 or PO125 code? If so, that is basically telling you that the engine hasn't reached the proper operating temp within a specific amount of time. Many things are considered, for example, time, ambient air temp.
The code usually will come up if for one of the following reasons:
Insufficient warm up time
Low engine coolant level
Leaking or stuck open thermostat
Faulty coolant temperature sensor
What I recommend is to reset the computer and see if it comes back on. If it does, then chances are one of the things I listed above is the problem.
Let me know if you are getting a different code.
Tuesday, October 13th, 2009 AT 11:10 PM