OBD Code PO125
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Token Redneck
Joined: Jun 2007
Posts: 9,337
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From: Breckenridge, TX
OBD Code PO125
2000 Expedition, 4.6L Windsor is throwing code PO125- "Insufficient coolant temp for closed loop fuel control." The engine itself eventually warms up, but the temp guage never moves. Is this just a sensor malfunction?
5th Wheeling
Joined: Aug 2006
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New User
Joined: Dec 2008
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I'm having the same as many here. The PO125 code popped and my ALLDATA wants my to trouble shoot pages worth of wires and harnesses. So the masses here say remove and replace thermostat and I should be OK...RIGHT?!? I have the 5.4L F150 with about 105K. PLEASE HELP my baby.
Posting Guru
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New User
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I can say it's warmed up. I was traveling home from work 20 minutes on the I15 when it came on. I did notice the temp gauge alittle lower than normal.
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5th Wheeling
Joined: Aug 2006
Posts: 35
Likes: 0
I'm having the same as many here. The PO125 code popped and my ALLDATA wants my to trouble shoot pages worth of wires and harnesses. So the masses here say remove and replace thermostat and I should be OK...RIGHT?!? I have the 5.4L F150 with about 105K. PLEASE HELP my baby.
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
When you find one of these trucks where the ECT or the CHT is responsible for this code instead of low coolant or a leaky/stuck open thermostat, you let us know.
This is a simple and inexpensive repair. Just go do it.
Posting Guru
Joined: Aug 2008
Posts: 1,211
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The problem code is due to the engine not warming up as fast as it should.
When you find one of these trucks where the ECT or the CHT is responsible for this code instead of low coolant or a leaky/stuck open thermostat, you let us know.
This is a simple and inexpensive repair. Just go do it.
When you find one of these trucks where the ECT or the CHT is responsible for this code instead of low coolant or a leaky/stuck open thermostat, you let us know.
This is a simple and inexpensive repair. Just go do it.
Diagnostic Trouble Code (DTC) P0125 indicates the CHT sensor has not achieved the required temperature level to enter closed loop operating conditions within a specified amount of time after starting engine. This DTC will light the MIL.
Possible causes:
- Insufficient warm up time.
- Leaky or stuck open thermostat.
- Low engine coolant level.
- Malfunctioning CHT sensor.