Question about 2006 Chevrolet HHR

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2006 HHR, check engine light came on, the engine coolant temperature gauge stays at 0 and the coolant link on my panel just shows ----F. Also my remote start won't work

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Your coolant temp sensor is not registering. It probably set a trouble code, that's why your remote vehicle start is not working. The temp sensor is located at the rear corner of the engine block on the back side of the engine. This will be the corner of the engine closest to the driver. The temp sensor may be faulty, unlugged or there could be problem in the circuit. Even if you find the sensor unplugged and you plug it in, the code will have to be cleared before the remote vehicle start works again.

Posted on Oct 03, 2009

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It ended up being the thermostat, this was replaced and then code was reset and the remote started working also.


Posted on Oct 12, 2009


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Need a coolant temperature sensor wiring diagram for a 2004 pontiac grand prix gtp

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Coolant sensor

Jeff, you haven't said what the problem is or what vehicle you have.

However, be aware that some vehicles have two coolant sensors.

One sensor sends a signal to the ECU to help control the running of the engine. The other sensor sends a signal to the temperature gauge on your dashboard - it shows you what temperature the engine is at - i.e cold, normal or hot.

If your vehicle has two coolant sensors, failure of the first type would more than likely illuminate an engine check light.

Failure of the second type would cause the dash temperature gauge to permanently read cold or hot, irrespective of the true engine temperature.

To locate this second type of sensor, look in the area of the thermostat housing. It screws into the engine block and will have 1 or 2 wires connected to it.

The link below shows generic images of this second type of sensor:

coolant temperature sensor Google Search

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