Cel Po128
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Tuned
Joined: Jul 2002
Posts: 462
Likes: 5
From: Kansas City, Mo
Cel Po128
I usually post in the Excursion forum but need help with wife's Expy. 2004 5.4, 203,000+ miles. Got this code for the second time today after about an hour to hour and a half drive. Code reader says (Coolant temperature below thermostat regulating temperature). Could I need a new thermostat? Thanks in advance for any help. John
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Tuned
Joined: Jul 2002
Posts: 462
Likes: 5
From: Kansas City, Mo
Originally Posted by sbclemens
Does it take longer for the engine to heat up when first started? It could be the thermostat or the temperature sensor.
5th Wheeling
Joined: Aug 2006
Posts: 35
Likes: 0
Originally Posted by shadows4
I usually post in the Excursion forum but need help with wife's Expy. 2004 5.4, 203,000+ miles. Got this code for the second time today after about an hour to hour and a half drive. Code reader says (Coolant temperature below thermostat regulating temperature). Could I need a new thermostat? Thanks in advance for any help. John
Like the man says, change the thermostat
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2002, 2003, 54, cel, coolant, ect, engine, expedition, f150, ford, mountaineer, po128, regulating, temperature, thermostat
