Question about 2009 Pontiac G6

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Temp gauge stays at 100 and fans come on rite away and stay on as long as the key is on

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: temperature gauge

The thermostat could be stuck wide open, but that wouldn't cause the vehicle to run at such a low temperature, my bet would be on the temperature sensor. When replacing it, be sure to get the one for the dash, your enging has two temperature sensors on it, one for the guage on the dash, and one for the computer so it can monitor and adjust air/fuel ratio in accordance. You will need the temperature sensor for the dash.

Posted on Aug 05, 2008

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SOURCE: cooling fan kicks on when start of vehicle, the

PCM is probably not getting a signal from the temp sensor, so it's kicking the fans on just in case. Check connector on sensor. If connector is OK, replace sensor. The sensor is mounted on the thermostat housing near the end of the upper radiator hose. See picks of a couple engine examples below. The part is only $11 at, and a pic is pasted below. Let me know if you have any questions.

2.4 liter engine:


3.4 liter engine:


coolant temp sensor:


Posted on Nov 08, 2010

  • 49 Answers

SOURCE: When I turn the car on the fans come on and stay

either the radiator fan relay (electromagnetic switch) is shorted closed, applying power to fans constantly, or the engine coolant temp (ect) sensor is not or is unable to send proper signal to the computer cause the fans to default on ( this would also set the check engine light). I would check for codes first. Then check the relay to see if it is actuating properly when power is applied and removed. Next check the ECT for proper resistance. If the you get an over limit (OL) reading on your multimeter then the sensor is bad. Next I would check the wiring from the ECT sensor to the Powertrain Control Module for possible short to power or ground. If everthing checks out to this point it may be the PCM, though unlikely.

Posted on Dec 14, 2010

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SOURCE: I have a 01 pontiac grand am V-6 and when I start

The most common cause of this condition is that the Engine Coolant Temperature (ECT) sensor is either defective or the wiring connector to it is defective or the sensor connector is disconnected from the sensor, this causes the computer to go into default cooling fan operation, default is that the cooling fan is always on and of course the temperature gauge can't read the sensor signal so it will not indicate engine temperature. The ECT sensor is located at the engine thermostat housing, below is a picture of the ECT sensor.


Posted on Dec 14, 2010

  • 5370 Answers

SOURCE: 2008 grand prix gxp. there

The fan are controlled by the engine computer based on input from the coolant temperature sensor. unplug the Coolant temperature sensor and see,if the other fan comes on.There are three wires from the Engine Coolant Temperature sensor or CTS for short (Coolant Temperature Sensor). One wire gives the temperature signal to your dash temp gauge, one gives a temperature signal to the PCM, and the other provides a low reference signal to the PCM and provides the signal to turn on the fans.If the CTS wire is short then it will not signal both or any one fan to come ON.---------- To check Coolant Temperature sensor wiring.Click this link below:-- ----------- Also you check the fan connections and wiring too,this will help to locate the exact short in wiring:--- To get the exact wiring.Please click on the link below:----
You can see in the last diagram that the fan relays go directly to the PCM to get the ground (or low reference) signal in order to engage and that comes directly from the CTS.You can see in the last diagram that the fan relays go directly to the PCM to get the ground (or low reference) signal in order to engage and that comes directly from the CTS.You can see in the last diagram that the fan relays go directly to the PCM to get the ground (or low reference) signal in order to engage and that comes directly from the CTS.
You can see in the diagram that the fan relays go directly to the PCM to get the ground (or low reference) signal in order to engage and that comes directly from the CTS. ----------- This should help.Thanks.Helpmech.

Posted on Feb 04, 2011

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