I am getting a po125 reading from the obd scanner insuficiant coolant tempeture i wish to replace the ect sensor i need the location and the instructions on how to install a new sensor
I hope you realize that the po125 DTC code does not necessarily mean that you have a problem with the cylinder head temperature [CHT] sensor or the Engine Coolant Temperature [ECT] sensor.
It only means that the coolant temperature is too low for closed loop operation.
Other issues that may trip a DTC po125,
I would clear the code and see if it comes back- since you won't experience any difference in engine operation anyway.
You'll need to perform a continuity test on the sensor, when the engine is cool and then again after warming up the engine.
Then you'll want to take voltage readings on the wire harness that goes from the ECT back to the GEM.
You may find that the wire harness from the sensor to the GEM may be shorting out.
However, I would think that, if anything, the thermostat would be the culprit and malfunction before a faulty sensor.
You'll find the sensor under the upper radiator hose where the thermostat housing is mounted on the engine block. It may be obscured by the alternator.
And if you don't mind my 2 cents worth of friendly advice, either purchase a Chilton or Haynes repair manual from your local auto parts store or online.
Good luck on your project.
SOURCE: 2003 toyota corolla please help me with this code po125
Did you bleed the coolant system?This needs to be done,and it should be fine,but you will have to have the code erased too.
SOURCE: where is the ect(coolant) sensor
The engine coolant temp sensor is located just below the throttle body.Just remove the air cleaner tube and you should be able to see it.There will be a black and a yellow wire on the connector.Hope this helps.Good luck.
SOURCE: '01 Sequoia throwing 2 OBD II codes: po125
DTC P0125 OBD-II - 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. You will likely not notice any drivability problems.
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
DTC P0135 OBD-II - Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
This code refers to the front oxygen sensor on Bank 1. The heated circuit in the oxygen sensor decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0135. You will likely notice poor fuel economy the illumination of the MIL.
A code P0135 may mean that one or more of the following has happened:
O2 Heater element resistance is high
Internal short or open in the heater element
O2 heater circuit wiring high resistance
open or short to ground in the wiring harness
For additional details, feel free to contact us in the preivous code link.
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SOURCE: How to read TCM codes with OBD scanner?
Really that is all you need unless you want to spend $200 on a better scanner. Post that code on line and you will get the problem and fix suggestions. Or purchase a repair manual (Haynes) which has the codes and sensors listed but leaves the repair solutions to you. Remember that a code can be caused by more than just a bad sensor so be careful.
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