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TROUBLESHOOTING P0174 - Sable Mercury Cars & Trucks

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If the Information Center is not reporting that the car is overheating, then it is safe to run for a SHORT time but you must pay very close attention to the car so that you can let it cool at the FIRST sign of overheating. Also, this is not a problem that you want to ignore, you want to get it fixed ASAP. In the meantime do not sit still with the car running for long periods of time, including traffic, the air blowing under the hood while you are driving helps keep the motor cool especially in the cold weather we've been experiencing. Also, you may want to check to see if you have a hose that has disconnected itself or that is leaking. By your description it sounds like the thermostat is not letting water through to cool it especially because of the heater problems you are also having. The thermostat is probably still working off and on and is not completely stuck or maybe not fully opening to let the water flow through the motor to cool it, this would explain why the heater gets hot occasionally. Hope this helps to fix your problems.

*I was a Cadillac Mechanic for 33 years (I am now retired) after I served in the navy as a flight engineer

Posted on Jan 04, 2011

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