tjkj2002 wrote:
Your not getting the fact that at dead center(temp guage) the coolant temp is somewhere between 178 degrees and 229 degrees,half that range is "under normal operating temps".
The t-stat can open early(or stuck open) and you will reach 178 degrees but in say 20mins instead of 10mins for a t-stat that does not start to open till 195 degrees like it is supposed to.
In over 20 years I have never ran into 1 vehicle with that code that the temp sensor was the issue,that's hundreds(if not thousands) of vehicles that I've diagnosed with that code.
Even some cooling systems with dual coolant temp sensors when one temp sensor goes bad it always sets a different code and not P0128.
Thank you for confirming it is not likely the coolant temp sensor that is the issue. As I loosely said in the first post of mine you quoted.
"If the engine operating temp gauge is reading in the middle, odds are that is not where the problem is."Then followed up in the second post of mine you quoted.
"Which means the coolant temp is being transmitted from the sensor to the PCM and other computers which need it.""this is a good indication the coolant temp sensor and related circuits are working. Not saying it is perfect, but at least it is working." "So that would, at least, eliminate the connectors and wires involved with the coolant temp sensor as the problem."At no point did I say the problem
was the engine coolant temperature sensor. Both you, and I know, only a test could verify that for sure...
Liberty for All, in post 1, asked specifically what sensors were involved.
So that was the main question I addressed. But that was not all I addressed.
Liberty for All asked;
"I read sometimes this code can mean one or two sensors are bad. If so, where can I locate those sensors on the engine?"I answered both those questions.
Liberty for All, also asked;
" Ideas about what else it could be?"If you see my first post in this thread, I mentioned several things that could be the cause. Including the thermostat.
"Low coolant, bad thermostat, Bad/shorted engine coolant temp sensor and/or wires, Bad/shorted Ambient air temp sensor and/or wires, and a few more."In Liberty for All's second post he asked about testing the sensors.
The first post of mine you quoted addressed that question as well.
So I'm not sure what your trying to say, that I haven't already said.
If I am interpreting your posts correctly;
I believe you have been hinting around that it is likely a problem with his thermostat, But haven't out right said it.
If that is the case, a simple post similar to, "It is probably a problem with your thermostat.", would have sufficed.
Which would have made all the rest of these posts unnecessary, and there would have been no comments or arguments from me about such a post...