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CEL P0597

874 Views 0 Replies 1 Participant Last post by  e.usaf
Hey all. I got a CEL with code P0597, "Thermostat Heater Control Circuit / Open". I ran my OBDII scanner for a 10 mile highway drive and found the coolant temp to be ~210 +/- 5 degrees F. That seems optimal so I'm ruling out a mechanical issue, which narrows it to something electrical. I'll have the car on ramps shortly to check connections to the thermostat housing. Where else should I look to potentially solve this? Any leads would be appreciated.
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