03 Expedition code PO125
fundilly
12-12-2009, 09:06 PM
Service Eng. Soon light came on...code po125 was read. Something about eng. runs too cool...any suggestions? Possible eng. thermostat stuck open or part way open or engine temp. sensor? The dash heat guage functions normally.
way2old
12-13-2009, 11:49 AM
I would start by replacing the thermostat. The dash gauge is just a general range gauge. If it does not warm up quick enough it can trip a code.
Automotive Network, Inc., Copyright ©2026