Question about Cadillac DeVille
If the engine is not really overheating and not low of coolant. Replace the temperature sensor.
The Failed temperature sensor has a zero reading for the Control board, without this reading the car starts running in limp home mode or Default and assumes the engine is running hot.So check the temp sensor and thermostat.If its faulty or weak you will receive this error. In some cases it has noticed that every thing in the vehicle checks out ok.But the wires in pcm touching and shorting out causing the computer to go nuts and it shows error on display.The pcm is the car's computer.Also check out if any coolant leak or vacuum leak.Get the ac pressure tested at local car garage to confirm leak.Mostly it leaks at the pressure hoses .Either the hoses are loose or worn out in such cases. Thanks. keep updated for any more query.you can rate this solution and show your appreciation.
Posted on Jul 04, 2010
Hello! First, what color is the coolant; Orange, green or brown? It must be Orange (Dex-cool) otherwise cooling system will need to be flushed...
Your vehicle requires Dex-cool (orange) system will become corroded...
This is the most common failure....Using the wrong coolant...System would need to be flushed...The recovery tank removed and washed...
Send a comment...Guru....saailer
Posted on Jul 04, 2010
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Posted on Jan 02, 2017
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