Coolant Temperature Sensor Location - Hyundai Forums : Hyundai Forum
 
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#1 Old 11-17-2009, 07:43 AM
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santafesuv
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Hello all,

My 2001 Hyundai Santa Fe V6 is giving out a P0118 code, and the "freeze-frame" data reports a -40F for the coolant temperature. That doesn't make sense so perhaps the sensor is faulty or perhaps the sensor connector is loose?

I'd like to take a look at the coolant temperature sensor but for the life of me I cannot find it. I have scoured hmaservice.com, hyunda-forums.com but all the various pics are still not clear enough for me to actually find the sensor. I have seen all the online pics from Hyundai but I can't get my head around exactly where the sensor is - the pics are either too zoomed in or so many things have been disconnected for the purposes of taking the picture I can't get my bearings.

I would really appreciate it if someone could take a super-obvious "for dummies" type pic so can know where to look. What do I have to remove or move? How do I disconnect the temp sensor? Does it just unplug? Does the sensor part unscrew from a cable?

Please, any help is greatly appreciated. I'd love to replace this on my own if I could without spending a fortune at the dealer.

Thank-you!

Acy
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#2 Old 11-17-2009, 10:21 AM
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Dear santafesuv,

Sometimes the trick is becoming more familiar with using the hmaservice features and searching other models in the same year with the same engine. Not every manual is equal in quality...some are rather sparse on detail.

In this case, I found a good picture of the coolant temperature sensor for the 2001 Santa Fe V-6....by checking under 2001 Sonata V-6, tab ETM, Component location index, Engine Coolant Temperature Sensor.

Byron

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Where's my bailout?
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#3 Old 11-19-2009, 04:54 AM
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santafesuv
(Thread Starter)
Thanks for the reply byronguidry3732!

Your help is appreciated. Here is a picture of my engine. Can you point to where I should be looking? What do I have to remove to find the connector?

[attachment=15298:1.jpg]
My open hood.

[attachment=15297:2.jpg]
Put my camera in to look for a connector. Is it one of these?

Thanks again.
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File Type: jpg 1.jpg (657.3 KB, 223 views)
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#4 Old 03-28-2010, 01:18 PM
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carvster1
QUOTE (santafesuv @ Nov 19 2009, 05:54 AM)
Quote:
[attachment=15297:2.jpg]
Put my camera in to look for a connector. Is it one of these?

Thanks again.
OK, I know this is very late but I just changed mine out and had to figure out where it was located. On your picture it is the bottom connector (your can see some threads showing) This might be too late for you but maybe for someone else reading this it might be helpful
When i changed mine i did not drain the coolant fluid first. i removed and quickly installed the other one. I did lose about a pint of fluid. the whole i was worried i would drop the new sensor and spill all my fluid on the ground. so i would recommend draining fluid first to not spill it.
The sensor was not expensive. i Think about 20 bucks and removing it is just disconnecting the cable and using a deep socket (sorry cant remember the size) and unscrewing it.
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#5 Old 07-10-2011, 12:20 PM
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cohron
Cool

QUOTE (carvster1 @ Mar 28 2010, 12:18 PM)
Quote:
OK, I know this is very late but I just changed mine out and had to figure out where it was located. On your picture it is the bottom connector (your can see some threads showing) This might be too late for you but maybe for someone else reading this it might be helpful
When i changed mine i did not drain the coolant fluid first. i removed and quickly installed the other one. I did lose about a pint of fluid. the whole i was worried i would drop the new sensor and spill all my fluid on the ground. so i would recommend draining fluid first to not spill it.
The sensor was not expensive. i Think about 20 bucks and removing it is just disconnecting the cable and using a deep socket (sorry cant remember the size) and unscrewing it.
carvster1,

Thanks my friend! Don't know if you'll see this or not, but I've been having a bear of a time finding that little bugger! Bought the Haynes repair manual and the diagram in there is the worst (or my eyes are just getting that bad due to old age!).

Ronbears!
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#6 Old 07-10-2011, 09:33 PM
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You cant see it unless you remove the engine top cover to expose the coil packs,, then the radiator hose is partially in the way too. Make sure you have a socket that the head of the connector will pass into so you can remove sensor and insatll new part.

BTW,, your engine bay is awfull dirty... had a fella complain that with the service he got, we did not wash his engine
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#7 Old 07-10-2011, 10:18 PM
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tuki632@hotmail.com
Hello:

I have a problem and I'm hoping someone can help:

A couple of weeks ago we had really heavy rain and I got stuck into a floaded street, got water all the way up to the middle of the doors, water inside the car, until it finally stopped, got all the lights on, but car would not start, we were expecting it was because it had gotten wet,

We waited until the next day but engine would not start, It does not give us the Check engine light, and mechanic says it does not have the ignition spark.



In the attempt to get it to start, they have tested the computer and it works, we tried changing it and nothing, we changed the ignition module, we reviewed the entire "harness" and it shows charge everywhere its supposed to, really do not know where else to look...



Any ideas if this car has some kind of sensor or plug that is sensitive to moisture or humidity that might be preventing the car to start?



REALLY REALLY WILL APPRECIATE ANY HELP I CAN GET!


Tany
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#8 Old 07-17-2011, 11:00 AM
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cohron
QUOTE (sbr711 @ Jul 10 2011, 08:33 PM)
Quote:
You cant see it unless you remove the engine top cover to expose the coil packs,, then the radiator hose is partially in the way too. Make sure you have a socket that the head of the connector will pass into so you can remove sensor and insatll new part.

BTW,, your engine bay is awfull dirty... had a fella complain that with the service he got, we did not wash his engine
I didn't have a 19mm deep socket and ruined the first sensor and just had to do it all over again. Make sure you have the right socket and be careful with the sensor, it's kinda sensitive.
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#9 Old 07-22-2012, 09:52 AM
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E43509
Just sharing in case someone else needs this info. Thanks to everyone for their posts on this as they were very helpful.
I opted to remove the radiator hoses to allow me easier access to the sensor. It wasn't that much extra work. I also drained the radiator ahead of time (After all these years, I had always removed the bottom radiator hose to drain but then I finally found the plug next to it that you can remove thru a hole in the frame with a phillips head screwdriver -- one of the pictures. You still end up getting fluid everywhere.)
Yes you need a deep socket but I had a set of impact that worked.
Wanted to post some more pictures for the next person who may need them.
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Last edited by E43509; 07-22-2012 at 10:00 AM.
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#10 Old 10-18-2014, 03:22 PM
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Unibabble is an unknown quantity at this point
I just changed my temperature sensor. I removed the ignition coil assembly to get better access to the sensor. Removing the coil assembly was the big task. After getting everything back together the now normal temperature range is much higher than the previous sensor. Has anyone run into this? I didn't pull the battery cable so it is possible I need to do this to force the ECU to recalibrate.

Normally the engine runs just below the middle range and the have two small black dots that appear to be a target operating range that the engine normally runs in.
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