Where is the Coolant Temperature Sensor located?

ANSWER : Hi there. For the coolant light to go out, you would need to have the coolant between the low line and the full line for the light to go out. If the coolant is low and keeps on being low, then look for any signs of coolant leaks. You may have to use a coolant pressure tester to pressurize the reservoir to allow the leak to be found.

If you need further assistance with the coolant being low and the warning light being on, then seek out a professional, such as one from Your Mechanic, to help you.

ANSWER : Was the output of the crankshaft position sensor viewed on a scope? If not, the sensor might have been perfectly good. If you are working off of codes please note that the mere presence of a code is not enough to condemn any parts. Codes represent clues only, and sometimes lousy clues, and all parts that might be "referred" to in a code must be actually tested before any determination can be made. With regard to the check engine light, the codes that are now being reported, whether new or old, should be tracked down which means the individual components have to be tested using the appropriate test equipment. Occasionally codes will set and identify components that actually have absolutely nothing to do with causing the underlying fault. At this juncture, the best thing to do to get this resolved is request a check engine light diagnostic. The responding certified mechanic will PINPOINT the actual cause of the fault and get this resolved promptly. If you have further questions or concerns as you decide what to do, do not hesitate to re-contact YourMechanic because we want you to make the most of your repair dollars and help you get the best possible results.

ANSWER : Hi there. The coolant temperature sensor on most Ford (Mercury is a Ford product) V-6 engines is located on the intake manifold, front of the motor and next to the primary coolant hose. If you don’t have one currently, if you’re going to attempt this repair on your own, it would be a very smart idea to purchase a service and repair manual online for your vehicle. It’s very handy and will give you great tips on how to correctly complete this and many other repairs.

ANSWER : Coolant temperature sensor is located at the upper radiator hose where it connects to the engine. Should be a green plug connector just to the left of the hose.

ANSWER : Hi there. The milky engine oil is caused when the coolant from the cooling system gets into the engine oil. There are two ways that the coolant can mix with the oil on your vehicle. The first way is through the intake manifold as the gasket may crack causing the coolant to drain into the valley area making the coolant mix with the engine oil. However, the engine will not overheat quickly when this happens. The second way for the coolant to mix with the engine oil is through a burned head gasket. To verify that the head gasket is burned, get a block tester from your local parts store and set up the tool by putting the blue chemical in the tube and putting on the plunger on the end. Then remove the reservoir cap or radiator cap (take precautions of the coolant) and start the engine. Take the tool and place it over the inlet area to the reservoir or radiator. When steam starts to form in the area, use the plunger and suck in the steam into the tool. If there is any hydro carbons (raw unburnt fuel) in the cooling system, then the blue chemical will turn to a yellow or greenish color. If the color changes, the head gasket is burned and needs replaced. If the chemical does not change color, then the head gasket is good and there could be a leak on the intake gasket. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose your engine overheating issue.

ANSWER : The throttle position sensor will not have anything to do with the coolant temperature. The problem with the coolant temperature gauge you had may be due to the coolant change that was done or the system itself has a problem. You stated that the fluids got changed but did not mention if the coolant was changed specifically.

In this situation, either your thermostat got stuck momentarily or there was an air pocket. Once it cleared, the thermostat opened normally and the flow returned back in the cooling system. I would have the system checked to make sure the coolant is full and that everything functions correctly.

If you decide to get this fixed, consider YourMechanic, as a certified technician can diagnose your cooling system and make the necessary repairs. Good luck.

ANSWER : If you have a bad knock sensor, then the engine timing may be going too low and causing the low rough idle. If the scanner gives a code, then have it diagnosed and fixed. A vacuum leak will also cause the rough idle and I recommend having this checked for, located, and diagnosed.

ANSWER : Hey there:

It’s common for many mechanics to make the mistake of mis-diagnosing the cause of an overheating situation; especially when they assume it’s a thermostat issue. The problem could be caused by a blockage in the coolant tubes running from the radiator to the overflow tank and back to the radiator. However, it also may be due to air trapped in the coolant lines. I think a good idea would be to contact a different ASE certified mechanic, such as one from YourMechanic, and have them complete a coolant flush, which should remove any blockages in the coolant tubes and may solve your problem.