1999 mercury mystique code p0125 came on..temp guage stays on cold.. where is coolant temp sensor located

My database just showed a text location for cts/coolant temp sensor. Upper left engine. You might look around thermostat housing? I don't think it's in the housing, but, might be close? I did look at wiring diagram for coolant temp sensor. Two wire connector, main wire colors brown and white. Good luck

P0125 OBD-II Trouble Code Technical Description Insufficient Coolant Temperature For Closed Loop Fuel Control What does that mean? This means that the engine coolant temperature (ECT) sensor indicates that the engine has not reached the required temperature level to enter closed-loop operation within a specified amount of time after starting the engine. Symptoms You will likely not notice any drivability problems. Causes A code P0125 may mean that one or more of the following has happened: Insufficient warm up time Low engine coolant level Leaking or stuck open thermostat Faulty coolant temperature sensor Possible Solutions The simplest thing to do is to reset the code and see if it comes back. If the code comes back, the problem is likely going to be the result of the above causes (faulty thermostat, faulty ECT sensor, or a low coolant level). Other ECT sensor and circuit related DTCs: P0115, P0116, P0117, P0118, P0119, P0128 Register now to ask a question (free) Related P0125 DTC Discussions 1996 chevrolet Caprice p0125 Car start properly but after 5 or 10 minutes driving start doing missing and stop. After that car will not start but 20 minutes it start but again stop, if you just start the care and don?t drive it will start 24 hours with no issue but if you will go for drive than you will stuck in middle of the r... P0125 on a Saturn Sc1 My grandpa's car has a p0125 check engine light on. Tha car will not start and is running rich on fuel. We tried replacing the fuel pump and filter, fuel injectors and even the coolant temp sensor and it didn't work. What else can it be? Here's the code. P0125- closed loop fuel control insufficien... 1997 corolla engine code p0125 Im getting code p0125 in my 1997 corolla and have changed thermostat coolant temp sensor and have topped up coolant level but code keeps reappearing any sugestions would be appreciated.... 2000 4runner P0125B code Engine light came on. Local garage read code as P0125B. Internet search says engine coolant temp. sensor which I will replace. Where is it located on 3.4L engine?... camaro codes p0404 p0505 p1404 p0304 p0122 p0125 Hey I got the codes when I ran my test p0122,p0125,p0304 P0404,p0405,p1404 was wondering what's all that and the price or it better to replace the motor...

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Front of engine kind of toward drivers side


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You should feel upper radiator hose to see if its even getting warm at all
If thermostat is stuck open then it will hardly even move
If it feels warm to the touch then its probably a defective coolant temp sender
Most of the time its a one wire connector located near thermostat
If so you can ground that wire to see if gauge moves
If it moves toward hot then just replace the sensor
I need to know which engine and I can give you specific instructions on how to test that circuit and even location of sensor

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First check water level (coolant ) .
then if it's full check ect sensor and wiring
then if that's good check thermostat for being stuck in open position can cause fuel delivery problems , even lean condition that will damage engine

coolant temp guage sensor

I would flush the radiator and replace the thermostat, and then see if the problem persists. if it does then I would look at thermostat sensor and possibly the water pump. Hope this helps Tim

Check the temp sending unit. That is what tells the gauge to move.

P0125- Engine not reaching operation temp quick enough. Possible problems:

• Insufficient warm up time
• Low engine coolant level
• Leaking or stuck open thermostat
• Faulty coolant temp sensor
• P1130- A/F Sensor Circuit Range/performance, Bank 1 Sensor 1

You might want to chk. the connection on the sending unit and temp. sensor thats the way they act when they loose a connection. If that chk. out ok then it would have to be the guage its self thats faulty.