360 Changing coolant temp sensor on front of engine

three coolant temp sensors? I see only 1? around the oil filter, that is

 

yea, you don't have to remove anything to replace that sensor. Done that multiple times
assuming you have average hands. i have average sized hands for 5'9''.

 

1) One cannot get to the sensor from the front of the engine. From inside the engine compartment, yes.
2) Nobody admits to having average hand size....

 

I would call this the "rear of the engine" and it's accessible from the top.

 

i have one 360 that has a leaking sensor(the washer actually), that's why I replaced it because its cheap .

I have another one replaced because I think the car's mifire is related to the aging sensor, so i replaced it.

another time I replaced it is because I removed the engine for overhaul so I think that's so cheap and I just replaced it for no reason.

etc etc

no code was thrown if installed properly.

In my tenure, none of these sensors failed i think , can't be 100% sure,

 

Mine failed and this was the result.
View attachment 4819289 View attachment 541904

 

So you were able to get to it by reaching around the intake, through the engine compartment not the cabin?

 

Anyone else have any issues with a P0116? I bought my car off of BaT and the dealer (seller) did the major service prior to shipping the car to me. In the receipts is a repair for a check engine light caused by P0116. They replaced the sensor and all has been well for the last 400 miles but now I'm poppin that code again. Do they go out often?

fwiw......the dealer charged $550 just to replace the sensor. They covered this and didn't charge me as they wanted to sell the car with no issues with was commendable. I'll be doing it myself for $20.

 

If the sensor is as accessible as it looks in the photo, I would try doing a resistance check across the plug pins. If the RH ECU is flagging an "out of range" value, then I'd guess that a resistance check would show something obviously wrong with the sensor. Here's a typical Bosch temp vs resistance chart:

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Temperatures in Celcius

Of course, there may be a wiring issue. With the ignition turned on, you could check for dc volts coming from the RH ECU. Note that the RH ECU provides power to the temp sensor through a wiring splice (see diagram below). This splice also feeds power to a number of other engine management components. Since there are no other faults, perhaps just part of the splice is faulty. Anyway, you can always check the wiring between the RH ECU and the sensor with a multimeter.

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Holy crap, what a reply, thank you. I do have a multimeter. Access is possible but will be difficult.

 

Excellent. Let me know if you need any further details.

Ah.. pity. I didn't realise. Looked easy in @carguy007 's photo. This might make it a bit harder if you decide to check the resistance of the sensor at higher temperatures. Don't burn yourself

 

I see the wire colours are easy to identify

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As usual.. Ian, your a wealth of knowledge. Incredible..

 

Thanks everyone for posting this. Just changed mine with a 19mm ring spanner and standing on a step stool. It was a bit tricky to get the thread started by hand and needed to push down a little bit. Had some misfire codes pop up with the sensor error. Mines a spider so needed to unbolt and power steering fluid resevoir out the way a bit to get a visual but still pretty easy access.

 

This thread is helpful, thanks to those who have contributed.

I was having the coolant leaking issue with P0116 error code. I replaced part 180137 last week and topped the car off with coolant. Drove it a couple nights and the code cleared itself which told me I solved the error code. Drove it a few more times and again tonight when returning home I’m back to where I started, P0116 with coolant on my driveway. I put around 210 miles on the car since changing 180137 last week. Any ideas for next steps? I suppose I could have received a faulty part, but that seems unlikely.

Thanks,
Ryan

pic from tonight
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I would look on the left side of the trans (if looking from behind) and follow the coolant cap hose down that side to the floor pan.

If that is where the coolant is coming from, I’d say it’s likely your cap is bad. Very common.

But if that’s the case I would recommend a full flush and fill to eliminate the worry for air pockets.