2002 Lincoln LS P1299 Overheat Code

LINCOLN LS
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NJM0604
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  • 1 POST
I have a 2002 Lincoln LS and the engine light came on last week. I had the code run at a local auto parts store and found out that it was Code P1299 Cylinder Head Over Temperature Protection Active. What exactly does this mean? Am I going to have to replace something in the engine or is this just to let me know that the car overheated at some point? It did register that it had overheated right before the light came on, but it was just a brief period. I pulled right into the auto repair place and they added a little coolant (though they said it wasn't low) and ran the diagnostic on the check engine code.
Apr 12, 2007 at 1:35 AM
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BESTBET777
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Check oil for water, white color. Check water for oil, slippery. Flush cooling system. It sounds like a hot spot.
Apr 20, 2007 at 1:08 PM
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TECH1JONES
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The engine uses a sensor in the heads. to tell the computer what the actual head temp is(instead of just what the coolant is) If it sets this code either the sensor is having issues or it actually got hot, you should have the engine tested for combustion leaks into the cooling system(we call it "BLOCK LEAK TESTING") if the test turns out ok then have your mechanic look into the sensor.

hope it helps
Nov 20, 2009 at 3:32 AM

Suggested Repair

Check the oil for coolant contamination and the coolant for oil, then flush the cooling system. Have a block leak test done for combustion gases in the coolant. If that test is clean, have the cylinder head temperature sensor inspected.

Conversation Summary

The owner of a 2002 Lincoln LS reported a check engine light and code P1299, Cylinder Head Over Temperature Protection Active, after a brief overheat. Coolant was added even though the level was not low. One reply suggested checking for oil and coolant mixing, flushing the cooling system, and treating it as a possible hot spot. Another explained that a cylinder head temperature sensor can set the code if it fails or if the head actually overheated, and recommended a block leak test followed by sensor inspection if no combustion leak is found.

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