Coolant control valve malfunction

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 : Hi there. The best advice I can offer is for you to complete one of two things. First, it would probably be best to have a professional mobile mechanic come to your location and complete a check engine light inspection so they can pinpoint what part of the EVAP system is causing your failed emissions test. If you decide you want to do this on your own, then it would be a good idea to purchase a service and repair manual for your Ford Mustang – so you can look at detailed diagrams and replacement instructions.

ANSWER : You’re getting into an area that is kind of a dark art when you’re getting these kinds of codes. While I don’t know any of the symptoms that the car is exhibiting, I can tell you that failure in one of the control units can lead to codes showing up in the others and the ABS, ESP is a likely culprit since it interprets the wheel speed signals and sends the information to the other modules. You’re right that the module has to be coded, and I don’t think that Snap On has the software for that so the only place to go is the Star Diagnostic. (The consumer version of the Mercedes SDS ) You can Contact YourMechanic and see if anyone in your area has the appropriate equipment for this. Otherwise, this may be a case that would best be consigned to the Mercedes Dealer.

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.

ANSWER : Check the transmission fluid. If all testing eliminates the head gasket, cracked cylinder head, etc, it may be a cracked radiator.Transmission fluid is sent forward to the radiator to be cooled. Ir runs into what is typically called the "side tanks" of the radiator. So the transmission fluid and coolant are both flowing through the radiator and kept apart just as the engine oil and coolant are kept apart in the engine by the head gasket, coolant and oil passages, etc. If the tank in the radiator is cracked internally, transmission fluid may actually be forced into the coolant as transmission fluid is under higher pressure than the coolant. Short of a cracked head gasket, cylinder head, or engine block, it’s really the only other source of any type of oil getting into the coolant unless the vehicle is equipped with an engine oil cooler as well.

ANSWER : Hi there. i have forwarded your request to our service and sales department, which should be contacting you shortly with specifics to the questions you’ve asked. In general however, a proper radiator flush would include removing coolant from the lower hose connection (not the petcock) and the block. Our mobile mechanics always bring more than enough coolant than what is required, and will use the recommended type of coolant with the correct 50 / 50 ratio of coolant to distilled water. The brands are pretty much all identical in formulation. The critical thing is making sure to correctly bleed the system afterwards, which is something all of our professional mobile mechanics will do after completing this service.

ANSWER : Hi there, thanks for writing in. The coolant control valve controls the flow of coolant to the engine, the storage tank, and the heater core. A fault with this valve could prevent proper engine starting and reduce your fuel economy or even cause the engine to stumble, not to mention the lack of heat inside the car during a cold morning.

A code stored that points to the valve does not necessarily mean that the valve has failed; what if the wire is broken that powers the valve? I strongly suggest acquiring a qualified technician to perform an inspection for a second opinion in order to avoid replacing unnecessary parts. YourMechanic has several available technicians that can assist you with a Check Engine Light inspection and provide you with a detailed estimate and direction of repair. Good luck.

ANSWER : The coolant control valve on your Toyota Prius controls the flow of coolant in and out of the coolant storage tank. By diverting coolant into the storage tank, it can keep the coolant heated in order to keep the engine at operating temperature, allowing it can run more efficiently as well as allow the use of the heater even when the engine is not running. This valve can become stuck over time and the computer recognizes that there is incorrect coolant flow. When this happens, a Check Engine Light will illuminate and open the OBD code P1122. This is a pretty straight forward repair, so I would recommend enlisting the assistance of a certified mechanic to come by verify this concern and make the necessary repairs to get your cooling system 100% operational again.