Question about 2003 Toyota Avalon

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My temperature sensor wires were "chewed" by mice ... the wire right at the top of the sensor is just about to break off so need to replace the wire at a minimum or replace the complete sensor and wiring ....

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Posted on Mar 25, 2011

  • ronald_carde Mar 25, 2011

    prostreet55 - thanks for the advise .... one issues is the wire at the top of the sensor is just about to break off .... can or should I consider soldering that or will that affect the output of the sensor .... I'm getting a reading on the dashboard gauge now just concerned that wire is going to break. Ron

  • prostreet 55
    prostreet 55 Mar 25, 2011

    yes it looks as if the area at top of pigtail has a wax or something there to keep moisture out so soldiering might melt that , but hey won't hurt to try that way first.



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Temperature gauge is in red all the time even cold

It's probably the temperature sensor at fault and just needs replacing, which is a very easy and straightforward job to do.

You haven't said what sort of car you have. Just be aware that some vehicles have two temperature sensors.

One sensor connects into the harness and sends a signal to the ecu to help the fuel and air sensors control the mixture. It is NOT this sensor that needs to be changed.
Similar to:
It looks different:25937804-xmkubss43dmtqbveprcgg0ys-3-1.jpg
It is this sensor that sends a signal to the gaugue on your dashboard.

The above photo is for example only. Your sensor/sender will have either 1 0r 2 wires attached to the top.
To remove it, simply unclip the wire from its terminal and then use a wrench to remove the unit itself. You'll find it -usually- in the engine block underneath the cylinder head area.

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#1 cylinder is not firing. Coil is working as I switched it with another cylinder. Fuel injector is new. Mice chewed the two injector wires at the clip to the injector. They were pressed together. Can

Have you tried replacing the plug on that cylinder ? Might be bad . Also I would replace the wire to the injector that the mice ate. Could be damaged in more then one place.

Jan 26, 2015 | 2005 Scion xB

1 Answer


If the fan is not working at all, there are a few things that it can be. Bad cooling fan motor, bad cooling fan relay, bad engine temperature sensor, wiring problem (e.g. mice love chewing vehicle wiring) If you are unable to diagnose it yourself, I highly recommend taking it to a reputable repair facility in your are to have them find the problem for you. I see too many people on here that throw a fortune worth of parts at their car and they still have the same problem.

Oct 16, 2012 | 1999 Plymouth Voyager

1 Answer

My needle for my temperature gauge is not workin it points down tha hole time and i replaced the sensor what else could it be

First off you need to make sure you replaced the right sensor alot of vehicles are equipped with two coolant sensors on feeds the computer information and the other sensor registers temperature on your gauge so make sure you replaced the right one.If you did replace the right one then possibilities are a break in the wire from the coolant sensor to the temperature gauge on your dash also could be your temperature gauge on your dash could be faulty.

Jul 27, 2011 | 2004 Chevrolet Impala

1 Answer

Car was parked & mice chewed on wires under hood on & around engine

That is not good. They will need to be replaced of course. The only problem is replacing them. It is hard to tell what all they chewed up. It could be more then what is shown.

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Wont idle when cold, started after mice built nest in air box

Check for pieces of straw, paper etc in the MAF sensor. The mouse nest may have flown apart and bits are residing on thew sensor....

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1 Answer

Was trying to replace the oil sensor switch and was told hada wiring problem with the sensor. Does that sound right?

Well it depends on who told you that and how much investigation that person did with the vehicle.
If this is the emergency cuttoff switch then I am not sure how the wiring could be the problem unless someone has been hacking and slashing the wiring. If it is original wiring and you have determined that this switch is the problem for a no start condition then I would go ahead and replace the switch.
If a shop is telling you that then make them show you the problem and if they fix it make them give you the old bad part.
I would be suspicious if a shop was telling me that. Wiring doesnt get hosed usually for something like that all by itself.
now thats not to say that mice couldnt chew it and short it out. Though it might be more likely a mechanic slipped with a wrench and broke it off. lol

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