How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Mike S. Your Own Question
Mike S.
Mike S., ASE Certified Technician
Category: Dodge
Satisfied Customers: 7369
Experience:  ASE certified
20625509
Type Your Dodge Question Here...
Mike S. is online now
A new question is answered every 9 seconds

Need location of coolant temp sensor for computer? Not for

Customer Question

Need location of coolant temp sensor for computer ? Not for gauge ! Scan tool reads -40 at full op temp.
Submitted: 9 months ago.
Category: Dodge
Expert:  Chad Farhat replied 9 months ago.

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

Expert:  Chad Farhat replied 9 months ago.

hey how are you

it is bottom right in the diagram i sent you , this is the one for the computer as requested

ENGINE COOLANT TEMPERATURE SENSOR - DIESEL ENGINE The Engine Coolant Temperature (ECT) sensor is located on the left side of the cylinder head behind the fuel filter and below the intake manifold.

REMOVAL WARNING: THE COOLING SYSTEM MAY BE UNDER PRESSURE. HOT COOLANT CAN CAUSE BURNS. 1. Partially drain cooling system until coolant level is below cylinder head. 2. Drain and remove fuel filter/water separator. 3. Disconnect ECT sensor pigtail harness connector from sensor. 4. Remove ECT sensor from cylinder head. INSTALLATION 1. Apply sealant to sensor threads. 2. Install ECT sensor into cylinder head. Tighten to 55 Nm (40 ft. lbs.) torque. 3. Connect ECT sensor wire connector. 4. Install fuel filter and bleed fuel. 5. Fill cooling system and check for coolant leaks.

1996 Dodge or Ram Truck 2500 4x2 Pickup L6-359 5.9L DSL Turbo

Save Article

Select Print Option Complete Article Text Only Image(s) Only

Parts InformationOEM Part #Price

Coolant Temperature Sensor/Switch (For Computer)

Coolant Temperature Sensor

Part # 56004815 $22.35

Please let me know ,if that will work for you

Thank You

Chad Farhat

ASE Certified Technician

Customer: replied 9 months ago.

Chad I have changed the sensor on the drivers side of rear cylinder head ( single wire ) that one is to the gauge ? The sensor I seek is the one to the computer. 2 wire ? I have the fuel filter off there is nothing behind it ?

Customer: replied 9 months ago.

If that one is for computer its a single wire and with new sensor scan tool still says -40 at fill op temp. Working on a hard start when cool or cold.

Expert:  Chad Farhat replied 9 months ago.

ok one second , i found a better location picture for you

Expert:  Chad Farhat replied 9 months ago.

you have on in the middle of the head like in this picture i sent you now

Expert:  Chad Farhat replied 9 months ago.

Please let me know if that is it and you found it ?

Thank You

Chad Farhat

ASE Certified Technician

Expert:  Chad Farhat replied 9 months ago.

you are correct the computer one is 2 wires

gauge sensor has one wire

Customer: replied 9 months ago.

There is a hex head plug there no sensor ?

Customer: replied 9 months ago.

My production date is 4/96 maybe check 95 ?

Expert:  Chad Farhat replied 9 months ago.

ok i will give me a minute

Expert:  Chad Farhat replied 9 months ago.

4/96 is a 95 model ? let me see

Expert:  Chad Farhat replied 9 months ago.

that is the 95 model location

Expert:  Chad Farhat replied 9 months ago.

95 model ECT location

Expert:  Chad Farhat replied 9 months ago.

we have 2 different part # , you have 5.9 liter diesel correct ?

Parts InformationOEM Part #Price

Temperature Sensor (Gauge)

Temp Sending Unit

Part(###) ###-#### $57.35

Parts InformationOEM Part #PriceCoolant Temperature Sensor/Switch (For Computer)

Coolant Temperature Sensor

Part # 56004815 $22.35

Customer: replied 9 months ago.

Can't tell from pic where that is ? Do you have r&r instructions ? Sorry man this one is killing me !

Expert:  Chad Farhat replied 9 months ago.

its okay i understand

look at the cable n the picture that is in middle of head but kind in between head and valve cover ?

you can see the filter lines ,look at last picture it has to be there

the one at end is gauge , u clanged ,one in middle is computer

shine a flash light , use a mirror if need be

Disconnect the thermistor wiring harness. Clean the area around the thermistor thoroughly.

Zoom and Print Options

Remove the thermistor.

Zoom and Print Options

THAT IS THE ONLY R &R , BECAUSE IT IS ONLY , UNPLUG AND UNSCREW

Apply liquid teflon sealant to the threads when installing the thermistor. Re-connect the wiring harness.

^ Tighten the sensor
^ Refill Cooling System

Torque Value: 24 N-m [18 ft-lbs]

Expert:  Chad Farhat replied 9 months ago.

you can tell you have to kind look from under the valve cover lip and kind deep in

Expert:  Chad Farhat replied 9 months ago.

try this one

Customer: replied 9 months ago.

Not real familiar with these engines its a straight 6 turbo diesel vin # 3b7kc23cxtm164777 is that a 5.9

Expert:  Chad Farhat replied 9 months ago.

and that exactly what i m pulling on the diagrams location i double checked

i m not sure man on this one , you have to have one , but i understand what you saying if you cant see it ,you cant see it

have you tried looking from bottom up , crawl under it ?

Customer: replied 9 months ago.

Hey chad had this rig on rack searched everywhere ! Lol. None of pics look look the same as my engine. Still can't locate sensor ! Will look some more today ! Been a tech for 35 years this one has me stumped if you think of anything that might help. Can't believe can't locate comp temp sensor weird. Lol anyway thanks for your help hollar if you think of anything ! I even have all data and a shop service Manuel but sensor is not where anything says it is is. You would think even an idiot could locate a simple temp sensor ? Lol

Expert:  Chad Farhat replied 9 months ago.

I m sorry man , i dont understand it

if i find anything else i will let you know .'

please let me know if you do find it

Chad

Customer: replied 9 months ago.

Intercooled turbo if that makes any difference ?

Expert:  Chad Farhat replied 9 months ago.

sine you said that , i read that the pictures i have , go for non intercooled turbo ,i wonder if this is the issue

i does not list a computer sensor for the intercooled one ?

but how does the computer know the temp, must be read with some other sensor, i m not aware of one though

Expert:  Chad Farhat replied 9 months ago.

How about this location

Customer: replied 9 months ago.

That's part of the problem ! That's where Manuel and aldata shows it is but my engine is not set up like that. Pic shows ac comp to the right of alt ! This engine has ac comp below alt ?

Customer: replied 9 months ago.

This engine has alt on top then belt tensioner below that and ac comp below that. On pass side. There has to be a sensor somewhere since computer is seeing -40 at start up all the way to full op temp ? I going nuts fixing to set it on fire and call insurance comp.

Expert:  Chad Farhat replied 9 months ago.

i agree 100% you are seeing - 40 ,has to be there

does it looked anybody messed with wiring or engine or all looks good

Customer: replied 9 months ago.

Everything looks original and stock.

Expert:  Chad Farhat replied 9 months ago.

terry i never ran into one , i always found them in these location

it has to be on the head somewhere to read coolant temp

engine & vin # matches ,has engine been replaced

Customer: replied 9 months ago.

Hey brother I am still hunting this switch I know you have a lot of time in this can you open it up for other techs. Maybe someone else has some more into that would help me. I even took it to another shop and they can't find it!

Expert:  Chad Farhat replied 9 months ago.

yes i sure will , i will opt out of the question

good luck

Expert:  Mike S. replied 9 months ago.

The wiring diagram says the "engine coolant temperature sensor" is located near the thermostat.

Expert:  Mike S. replied 9 months ago.

A component search says the "engine coolant temperature sensor" is located near the alternator. Confusing, yes!

Expert:  Mike S. replied 9 months ago.

No wait, that one is the sending unit so it must be the one near the thermostat.

Expert:  Mike S. replied 9 months ago.

A diagram shows it between the alternator and a/c compressor.

Related Dodge Questions