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Trouble code p0125 which sensor do i need to replace

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The code says that engine temperature was not reached to allow closed loop operation. Basically the coolant temperature sensor did not inform the ECU that the engine had reached normal running temperature. 4 things to check: 1) coolant level 2) coolant sensor cable and connection 3) coolant sensor 4) thermostat The first two are fairly easy. To check the coolant sensor (3) drain the coolant into a bucket (you can reuse it when you refill). Put a voltmeter across the connector pins on the sensor. Now immerse the end of the sensor in a hot cup of water and again measure the voltage output. You are looking for a change either up of down in response to temperature change. If you see a change the sensor is OK, if not change it for a new one. Whilst the coolant is drained take out the thermostat and drop it into a pan of simmering water. The 'stat should pop open. Take the pan off the heat and after about 5 minutes the 'stat should pop closed, if it does it is OK. If the 'stat remains open then it is faulty and this is the source of the problem in that coolant circulation is unimpeded and the engine is is being kept below operating temperature.

Posted on Apr 02, 2011

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Posted on Jan 02, 2017

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How to repair P0125 for 2000 Mercury Mountaineer


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...

Read more at: http://www.obd-codes.com/p0125
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May 18, 2015 | 2000 Mercury Mountaineer

1 Answer

My 1998 pontiac firebird service engine light came on and my OBD11 scanner produced 2 trouble codes PO125 ( insufficient coolant temperature for closed loop fuel control.the 3800V6 engine over heating and...


service the engine.. change oil ,filter plugs etc

did you clear the faults before each read
Diagnose Buick 3800 Engine
unusual code that

P0125 is the OBD-II generic code for the engine computer, or Engine Control Module (ECM), not detecting enough heat in the cooling system before the fuel management system can take control. The ECM has a predetermined value after you start your vehicle to expect a certain coolant temperature

P0125 OBD II Trouble Code Insufficient Coolant Temperature for Closed Loop...

ecm runs the engine cooling fans

3800V6 engine over heating and heater produces cold air
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EGR vale not working
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Apr 16, 2017 | Cars & Trucks

1 Answer

Got trouble code p0125. Car starts then idles way low then climbs back to regular idle. What is the problem?


I have a 96 Towncar, which had a P0125 trouble code set. I changed the thermostat and cleared the code - only to have it reset in a couple minutes after starting. The car was hard starting, and died several times before it actually ran. I did also noticed that while running the idle speed had risen to over 950 RPM.

I changed the Temperature sending unit located next to the thermostat housing, and again cleared the code. After starting the car again it performed excellently and did not reset the P0125 trouble code.

Jan 02, 2012 | 2001 Lincoln Town Car

1 Answer

Code P0125


P0125 OBD-II Trouble Code - 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).

Hops helps (remember rated this) TY for use Fixya.

Jun 03, 2010 | 1999 Ford Taurus

2 Answers

Diagnostic trouble codes P0125,P0601


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.
http://www.obd-codes.com/p0125

P0601 OBD-II Trouble Code
Technical Description

Internal Control Module Memory Check Sum Error
What does that mean?

Basically that means that there is an interal fault in the Powertrain Control Module (PCM). There have been many reported PCM failures on Chrysler/Dodge products although it is possible for this to happen on any vehicle. In Dodge/Chrysler products, a P0601 trouble code means that a serial communication failed inside the computer at least 6 times.
http://www.obd-codes.com/p0601

Jan 14, 2010 | 2004 Dodge Stratus

2 Answers

OBD-II Trouble code P0125-Insufficient Coolant Temp for Closed Loop Fuel control. A code P0125 may mean that one or more of the following has happened: * Insufficient warm up time * Low engine...


Whenever i get this code i like to clear it and see if it returns. Sometimes in extreme cold weather conditions it will set this code and there may not be anything wrong. What motor is in your celica?

Jan 10, 2010 | 1996 Toyota Celica

1 Answer

1999 Camry 4 cyl. 104k miles, throwing codes p0125, p1130, p1135


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

Oct 15, 2009 | 1999 Toyota Camry

2 Answers

P0125 obd code


P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control
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.

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

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 coolant sensor, or a low coolant level).

Apr 22, 2009 | 1998 Ford Explorer

1 Answer

P0125 Trouble Code


Hello;
Looks like the coolant temp sensor for the ecm has started to go out. Test and replace, clear codes and should be ok.
Thanks;
Rich;
RPM Northwest

Jan 26, 2009 | 2000 Ford Expedition

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