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Coolant fans are not working egr value has been changed any suggestions

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There is coolant fan relay around the fender well just above the bumper that usually goes bad. It"s kind of hard to find. but it's there. Jack up your car on the drivers side the relay is on the drivers side. It's black not more then 2 inches square. It has two small 5/16 (socket) bolts that hold it in place. Oreilly or Auto zone should have it in stock. Take the old part with you.

Posted on Feb 07, 2010

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Where is the coolant sensor on a 93 century. 3.3 v6 I can't find where it is located. Top or bottom? Front or back?


A variety of sensors provide information to the ECM/PCM regarding engine operating characteristics. These sensors and their functions are described below. Be sure to take note that not every sensor described is used with every engine application. Coolant Temperature (ECT) The Engine Coolant Temperature Sensor (ECT) is a thermister (a resistor which changes value based on temperature) mounted on the engine coolant stream. As the temperature of the engine coolant changes, the resistance of the coolant sensor changes. Low coolant temperature produces a high resistance (100,000 ohms at 40°C/40°F), while high temperature causes low resistance (70 ohms at 130°C/266°F). The ECM/PCM supplies a 5 volt signal to the coolant sensor and measures the voltage that returns. By measuring the voltage change, the ECM/PCM determines the engine coolant temperature. The voltage will be high when the engine is cold and low when the engine is hot. This information is used to control fuel management, IAC, spark timing, EGR, canister purge and other engine operating conditions. A failure in the coolant sensor circuit should either set a Code 14 or 15. These codes indicate a failure in the coolant temperature sensor circuit.
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It looks like the above, under hood, passenger side, upper engine area, mounted in front side of water outlet (according to Autozone.com).

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Hi, I have a 00' malibu ls with an overheating problem. I have changed the thernostat, water pump, resvoir coolant tank and the radiator and still overheats. I was told if I clean the EGR it will probably...


Well, the EGR valve does lower the temprature of the burn, in the combustion chamber, but it cannot resolve the overheating...
Did you pressure test the cooling system? and Did you have the heater on HIGH heat, when filling? Did you use the correct mixture of coolant and antifreeze?
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There's a lot of information regarding your problem here:

http://www.saturnfans.com/forums/showthread.php?t=284

My suggestion would be to contact a local dealer and have them run the diagnostic (usually under $100), then if the part is easily replaceable, do it yourself. If it's more involved, then bargain with the dealer on a good price to have the problem fixed.

I truly hope that the Quad Driver itself isn't what's causing the code.

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