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2008 Cayman Base Coolant temp gauge inop - red light flashing

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Hey everybody,


I just joined here and this is my first post after reading the guidelines and searching for information. I found the following information but it's not quite my issue:



I'm sure Loren has posted this a dozen times, but there are 4 conditions for the temperature gauge light:

Four functions of the coolant warning light:

1. Engine coolant level too low

— light flashes slowly (0.5 Hz)

2. Engine compartment temperature too high

— light flashes slowly (0.5 Hz) (engine compartment blower might be faulty)

3. Engine coolant temperature too high

— light is lit; pointer on the right

4. Temperature sensor at water outlet faulty

— light flashes rapidly (1 Hz); pointer on the right


The temperature warning in point three is indicated if the conditions "engine coolant temperature too high" and "engine coolant level too low" are present simultaneously

(1Hz = 1 flash per second. 0.5Hz = 2 seconds per flash)



I seem to have misplaced my cheap scanner (or it grew legs and ran away) and will be going to the store tomorrow morning to pick up an icarsoft CR Pro (I have a few other vehicles) to read pids and perform proper diag for the CEL and Coolant Failure message. Ignore the Airbag light and other as that is from moving the car out of the garage to re-install the passenger seat. Now I'm thinking it's the temp sensor on the manifold pipe since the gauge needle does not move but I'm looking for a little guidance and experience as this is the first Porsche in the family.


Car was in perfect functioning order before the following work was performed by myself:

- water pump, coolant manifold gaskets and cooler thermostat 71 degrees as opposed to OEM 86 (I believe) and then used an Airlift Vaculift to pull vacuum and to refill the coolant. I've even tried opening up the bleeder valve and letting the car run with the heater core opened up. There doesn't seem to be air in the system and the reservoir is full.


I've attached a Google Drive link for a video:



Thank you for your help and experience in advance.


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