Based on info from various sites I have determined that the check engine code P1622 is related to the cooling system somehow. One site indicated that the code is "Electric Thermostat Control, Final Stage", while another site indicated that it is "MAP Cooling Control Circuit Electrical".

Any ideas what this may be related too? Looking at my ETK disk I noted that there is a electrical sensor/switch "Double Temperature Switch" nearby the thermostat. I am curious if this is the problem.

If anyone has the answer or has had this before I thank you in advance for the help.

DJ
98 740IL, 78K miles
SoCal