the radiator sensor is to control your fans. the two sensors near left side front of engine are for the temp for the ecu and the cluster gage. factory one they are speaking of in this thread is the large plug with green top. smaller one behind that is the one with one wire to the temp gage in your instrument cluster.

i have a bad o2 that i will be replacing this weekend. have them right here "denso's". only getting code 21 for the main left one. but will replace both. thinking i will also replace this sensor spoken of in this thread along with the 2 main o2's.

 

my 1992 sc 300 shuts down after driven 5-6 miles; won't re-start. I wait 3 or more hours; car re-starts. I drive again; the cycle begains again

 

I drive 5-6 miles; car shuts down, won't re-start. I wait 3 or more hours, car starts, i drive 5-6 miles car shuts. I replace the fuel filter; same thing. I thinking of re-placing the crankshaft sensor. HELP !

 

Fuel pump ecu most likely^^

 

Very interesting points I must try this this weekend

 

I haven't seen it mentioned; has anyone tried simply cleaning their OEM sensor? Corroded copper shouldn't be that tough to clean up, but I don't know how delicate the sensor itself is. If the quality of the aftermarket sensors is in question, as it seems to be, salvaging the OEM one would be worth a shot.

 

OEM toyota sensors are 40 bucks shipped on ebay. i'll be ordering one tomorrow and change it out. my cars got a quarter million miles almost so why the hell not. and my 0-60 time is 8.5 seconds. should be 7 according to lexus

 

I ended up finding other threads saying it's perfectly fine to just clean the sensor. However, when I took mine out, it had already been cleaned quite recently. Worse, the sensor was all busted up from the monkey that wrenched on it, with a broken plastic base, broken connector clip, and bare wire. So, I bought a new one, after all, and ordered a new pigtail connector which I haven't installed yet. I didn't notice any changes with replacing just the sensor.

 

same here , very clean but replaced it anyway
didn't notice any difference at all

 

how many miles do both of your cars have? i ordered my sensor today on ebay for 42 bucks because at the dealerships they were 90 bucks!

 

Mine's got 189,000 miles. I went with a Beck Arnley sensor (#158-0421), which you can get for $15 or less. It's probably off the same assembly line as the OEM part.

 

OEM sensor is shipped. i'll be posting up results when i install it and run some 0-60 runs.

 

150K KM or 93K miles
the sensor itself looked very clean but i could see on the brittle plastic that it must have been in there a long time , guess factory
cheap fix for around 18 USD here in Europe , just go for it Oldmantan its a preventing tune up you know it won;t go bad for years to come

 

changed mine today, about to go to work and see how it feels. reset the ECU as well. the old sensor looked awful

 

Bumping up old thread to see if it actually did make a difference or not, it's an interesting theory and perhaps if someone measured their 0-60 times on before and after it can help to prove it.