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Celsius IS a temperature measured in degrees, as is Fahrenheit.
I don't know about your rig, but my guess is that you can hold down the menu button or go to "set up". Get the temp to flash, push the up/down button until the change. If you are needing to make a manual calculation, Celsius is changed to Fahrenheit by multiplying the reading X9, dividing that by 5, and adding 32 to that number.
Ex== 30 degrees C to F is 30X9/5+32= 86 degrees.
Hi there: The engine coolant temperature sensor is a variable resistor with a range of -40 degrees F-265 degrees F (-5 degreesC-129 degreesC).
The engine coolant temperature sensor provides an input voltage to the PCM. As the coolant temperature varies, the sensor resistance changes resulting in a different input voltage to the PCM.
When the engine is cold, the PCM will demand slightly richer air/fuel mixtures and higher idle speeds until normal operating temperatures are reached.
The engine coolant temperature sensor is also utilized for control of the cooling fan.
Fig. 1: Engine coolant temperature sensor location - 3.3L and 3.8L engines
Check this test procedure:
Turn the ignition switch to the OFF position.
Detach the coolant temperature sensor electrical connector.
Using a DVOM set to the ohms scale, connect one lead to terminal A and the other lead to terminal B of the coolant temperature sensor connector.
With the engine at normal operating temperature, approximaterly 200 degrees F (93 degrees C), the ohmmeter should read approximately 700-1000 ohms.
With the engine at room temperature, approximately 70 degrees F (21 degrees C), the ohmmeter should read approximately 7000-13,000 ohms.
If not within specifications, replace the engine coolant temperature sensor.
Test the resistance of the wiring harness between PCM terminal 26 and the sensor wiring harness connector. Also check for continuity between PCM connector terminal 43 and the sensor wiring harness connector. If the resistance measures greater than 1 ohm, repair the wiring harness as necessary.
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P0128 indicates coolant temp lower than expected and P0522 indicates low input from the oil pressure circuit. The first one sounds like a thermostat possibly stuck open. Check coolant temperature. It should reach approx 195 degrees. The second one could be a bad OP sender, low oil pressure or some other problem on that circuit.
1st thing to do is change the thermostat. It is either missing, or stuck open (you provide good info). This is why the car is not running at operating temp and why you have little heat. The no blower for settings 1-4 probably means a bad switch.
the temperature sending unit on a 97 grand prix 3800 gt(which is also the coolant temperature sensor) is not accurate. the sending unit part of this sensor only sends info to the guage on the dash. the coolant sensor part sends info to the computer of the car. it is located under thermostat and somewhat difficult to get at. i had put a brand new one in and my temperature on my dash is all over the place---even with good thermostat and properly bled system. when i hook up a scanner to my computer, the coolant sensor is sending the computer(ecu??) what seems to be the right temp. anywhere from 194 degrees to 217 when hot. the guage however on dash go from 160 to 260 in less than 2 minutes.
Had the same problem, replaced the ambient air temp sensor in front of the radiator. Cost is like 10-15 bucks. Don't worry if temp doesn't change right away. Took me about 5 miles and then it worked great.
The transmission will NOT shift into the final gear (overdrive) when the coolant temperature is below 177 degrees F. The OD is coolant temperature controlled. In short, the colder it is outside, the colder the engine is, and takes longer to warm up to operating temperature. The coolant, when it reaches 177 degrees F, satisfies the temperature sensor, which allows the final shift. Assuming that you do not have a thermostat that is stuck slightly open, this is a normal occurance. Thanks for choosing FixYa for assistance.