vehicle has 250,000 mls. runs well, one owner , oil change every 3,000 . main seal leaks a little oil and a/c has slow leak but great vehicle. the day the diagnostic code P0125 illuminated the check engine light it was an unusual ambient temp near freezing. Checked codes and the only one was the P0125. I erased code and checked levels and specific gravity and was good.
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1995 Ford Ranger Question: Have diag code P0125 on frigid cold day. is thermostat faulty??
Answer #1G. T. Service Center (2226 Answers) , Stephenville, TX - (254) 638-3236ProfessorG January 07, 2014, 11:38Master
Change thermostat. Also if it continues, test the ECT, and IAT,
Replywh368, January 10, 2014, 12:25Rookie
I agree to change thermostat and if it persist I should check the resistance of ECT and IAT. I cleared the code and no further engine light response.
ReplyProfessorG, January 10, 2014, 13:49Master
Yes and make sure they are reading the proper ambient temp. Usually do this after it has sat overnight and engine is ambient as well. Resistance should be charted as to OHM's verses temp range.