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Re: Where is the coolant temp sensor on a 2003 escort...
There are 2 item located in the same area one is a little below the other.it is on the housing of the one you replaced, the top one is a low coolant sensor and the one on the bottom is the temp sensor.
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possibly change the wrong unit
gauges work from a sender unit not a sensor
it is located next to the thermostat housing normally and has only 1 wire connection
they work by having power through the gauge to the sender through variable resistance that is affected by heat to ground
test disconnect the wire from the sender
turn on the ignition key , ground out the wire and the gauge should go straight to full hot
sensors on the other hand have more wires and relay the coolant temp to the ECM so that air/fuel ratios can be adjusted , and fans switched on as required
theres two sensor one is the coolant temp sensor that is for your ecm it tells the computer how much fuel you need to perform at optimum performance it will be located on the backside of the intake now if its the coolant temp sender that actually tells the gauge were to sit that is going to be located on or at the thermostat which if you follow your upper radiator hose to your engine that where your thermostat will be located under the housing the house is hooked to the sender will be located there good luck
The coolant temperature switch and fan control switch are located sie by side, mounted in the steel portion of the heater hose that runs from the thermostat housing to the firewall, it is underneath the air intake tube and the ignition coil pack, mounted to the back of the cylinder head. Either drain out some coolant or be very quick, and you can unplug and unscrew each switch from the hose and replace it with a new one. Make sure the engine is cold. After replacing make sure to check the coolant level add as neccessary. The single wire connector switch is for the guage, and the other is for fan control. Hope this helps, let me know.
This CODE is Indicating that ENGINE COOLANT TEMP is NOT Reaching TEMP HOT Enough to >CLOSE LOOP < This is when ECM takes over ALL ELECTRONIC CONTROLS, . It Basicly Points at A Coolant Temp Sensor that is Faulty or Thermostat that is RATED too LOW. Engine Must Reach 200 - 220 degrees
make sure engine is COLD. put little grease around new sensor and keep it close at hand. Remove the plug on the sensor, then slide the retaining that holds sensor in, out. pull sensor our of housing and quickly replace with new. replace clip and plug. top up coolant if necessary. easy as that..