Water Thermosensor?
#1
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Water Thermosensor?
Hey guys,
I finally had a chance to pull that code that was causing the CE light to come on. Turns out to be code #9, the water thermosensor. I have no idea what this does, or what it measures, if it is broken or the connection is bad, if it is important, if I should be worried, or even how to find it. Anyone want to help fill me in? I really don't want to see that CE light come on all the time - it scares me. Let me know, if you can...
Thanks
Tyler
I finally had a chance to pull that code that was causing the CE light to come on. Turns out to be code #9, the water thermosensor. I have no idea what this does, or what it measures, if it is broken or the connection is bad, if it is important, if I should be worried, or even how to find it. Anyone want to help fill me in? I really don't want to see that CE light come on all the time - it scares me. Let me know, if you can...
Thanks
Tyler
#2
Rotary Freak
It tells the ecu to adjust for a cold motor , air / fuel ratio and timing , other controls. Just get it tested and replaced or find a broken wire or connector ect. Most chance it is the sensor that needs replacing . Do it and go for a ride and do not worry that you had to spent the money .
#5
Senior Member
my water thermo sensor went out, and a few days later it would barely run.....replace it.....the sensor is a 2 wire connector and is easy to replace.....it only costs 40-50 bucks....
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Could someone please tell me the specific area to look for it? I mean, is it close to the airbox, y-pipe, intake manifold, intercooler, battery, or what? I think I know where it is, and it looks as if the dealership broke it (wires pulled out, wire cut) and taped back together. If it is that, I can get it for free, and add one more thing to my evidence list. Thanks
#7
If I'm not mistaken its the black thing in the pic with the wire coming off of it, its below the aftermarket sensor I put on, on the thermostat housing. Its a bad pic I know, sorry about that. Hope that helps.
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That's awesome - thanks. I know exactly where that is. I have no idea why it's acting up, but at least I know where it is. One step at a time. Thanks again.
Tyler
Tyler
#10
don't race, don't need to
The thermosensor is DEFINATELY behind the filler neck. Pull your crossover tube (black plastic pipe from turbo to intercooler) and look down the backside of the filler neck. There is a green connector attached to a brass colored sensor screwed into the filler neck backside, right underneath the coolant hose that leads to the pipe that runs to the throttle body. These actually seem to be failure prone due to heat.
Part No. F202-18-840A
Part No. F202-18-840A
#13
don't race, don't need to
Ummmm... thermoSENSOR tells ECU what temp the engine is.
thermoSWITCH (sits right below the thermosensor) switches the fans on at 224F, and is the subject of the Miata mod.
both are a pain in the *** to get at and repop
thermoSWITCH (sits right below the thermosensor) switches the fans on at 224F, and is the subject of the Miata mod.
both are a pain in the *** to get at and repop
#17
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you can get thetemp thermo sensor at advance auto parts for $21.99
and the fan thermo switch at napa for $12.99
I replaced the fan switch, and ended up breaking the thermoswitch in half, went down to advance just to see if they had it and they did.
I have learned to always check your local parts stores before just assuming that is a dealer only part.
and the fan thermo switch at napa for $12.99
I replaced the fan switch, and ended up breaking the thermoswitch in half, went down to advance just to see if they had it and they did.
I have learned to always check your local parts stores before just assuming that is a dealer only part.
#19
don't race, don't need to
ThermoSENSOR, the one with the green connector, the upper sensor on the rear of the thermostat/water pump housing, give code 9, according to the manual.
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So this thermosensor is basically universal? I mean, if I go into Advanced Auto Parts and say "yeah, I need a water thermosensor for an RX-7" they would have it in stock? I have to get that thing replaced...I hate having the CEL come on - I feel like I am going to **** myself everytime it does
#22
canadian monster
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ok so the two wire is the thermosensor and the other one just under with only one wire is the thermo switch, is that it?
i don't have the connector anymore for the thermoswitch, anyone has a great idea? How come are there no thermoswitch on the japense engines? (i compared)
i don't have the connector anymore for the thermoswitch, anyone has a great idea? How come are there no thermoswitch on the japense engines? (i compared)
#23
don't race, don't need to
puma, that's right. The two wire is sensor, the single wire is switch.
Seems to me you might want to just do the Dysnay fan mod. Then thermoswitch is irellevant if you watch your temp gauge (linearized or aftermarket, that is...).
Seems to me you might want to just do the Dysnay fan mod. Then thermoswitch is irellevant if you watch your temp gauge (linearized or aftermarket, that is...).
#25
canadian monster
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Originally posted by kempo
you can get it at any auto parts store the KEM part# is140-715 ask for that # and that is what you need. it should run for about $25.00, at least thats the price i sell it for in puerto rico.
you can get it at any auto parts store the KEM part# is140-715 ask for that # and that is what you need. it should run for about $25.00, at least thats the price i sell it for in puerto rico.