Diagnostic Trouble Code (DTC): P0494 P0494 code definition If the PCM has detected a voltage reading that is too low from the electric cooling fan control circuit, the P0494 code will...
The purpose of the cooling fan relay is to pull air through the A/C condenser and the radiator. Most vehicles have two fans, one for the radiator and one for the...
The purpose of the cooling fan resistor is to remove heat from the engine’s coolant and from the A/C refrigerant. The resistor does this by drawing air through the radiator and...
The hose heater control valve opens and allows hot coolant from the engine to blow into the heater core. After the vehicle gets to the correct temperature, the thermostat...
The coolant recovery reservoir is both an expansion tank as well as a coolant recovery tank. In modern vehicles, the radiator has no cap so it has no upper tank for...
The coolant tube, or hose, carries coolant to and from the engine in your vehicle. First, the coolant tube removes the hot coolant from the engine and brings it to the radiator...
Diagnostic Trouble Code (DTC): P0495 P0495 code definition The P0495 code is stored when the PCM has detected a voltage reading that is too high from the electric cooling fan control...
Summer's heat, dust, and stop-and-go traffic will take their tolls on your vehicle. Follow these tips to ensure optimum wellness of your car: Air Conditioning: Have your air...
Flushing the cooling system is part of every vehicle's scheduled maintenance. This procedure is usually required every two to four years, depending on the vehicle. It is important...
I would not purchase a vehicle with a coolant leak without first having the vehicle inspected by a mechanic before I purchased it. You may have an engine that has been overheated and continues to overheat. It may already have...
Anytime you have a leak you notice as soon as you try and pour in any coolant then this is considered a major coolant leak and should not be driven until the leak is repaired. The coolant system water pump...
Hello, thank you for writing in. The radiator hoses can pop off for several reasons. Typically it is because the hose or the plastic neck that connects it to the radiator/component has failed. You will want to inspect both sides...
If you have a check engine light that is still on then you may need to have the computer scanned to make sure that there was no other codes or damaged from the overheating situation you had. You may need...
If you have sensors in the upper and lower hoses then I suggest checking to make sure you can remove them and cut the new hose? Otherwise you will need to get factory hose with sensors installed in them. The...
You may be developing a leak in the heater core. Your truck is about the right age. The heater core lives in the heat exchanger with the air conditioner evaporator so anything that happens in there will come out of...
To properly fill your cooling system, you need to start with the engine cold. With the engine off, fill the radiator slowly until the level is about 1"below the neck. Leave the cap off and with the car in park...
To begin with: you don't want to put straight water into your cooling system. You need to use a 50% mixture of water and anti freeze. You put it in at the radiator cap. Start with the engine cold and...
You need to check to make sure the condenser is not blocked in the front and that the fans are coming on when the a/c is on. The system may work okay in cooler weather if fan is not working...
In the old days, if the water pump was turning, it was working. But many modern cars have plastic impellers in the water pump and they can lose their grip on the shaft when they get old. It's hard to...
Wow! You'd better check the oil too! Driving the car this way is about the same as taking it out on the racetrack for about an hour. The racetrack always brings out any weakness that a car has so If...
Hello, thank you for writing in. If you did not get all of the oil out of the radiator before you started the vehicle, that oil is now contaminating the thermostat, water pump, and the engine cooling pockets. Even with...
Either the cooling fans on the radiator are not working properly or the radiator is plugged up to where there is a restriction when the engine's water pump is running at a slow speed. If you suspect that the radiator...
If the cooling system gets low at all, usually the first thing you notice is that the heat goes away. The system could seem to be full, but have air pockets causing your problem. That can be solved by bleeding...
A special dye can be added to the cooling system to detect the leak point. The dye is visible with a UV light source. Common causes of no, or inadequate, cabin heat include malfunctioning blend door(s) (part of the in-dash...
Engine coolant can leak externally through a hose, radiator, water pump, etc. or internally due to a leaking head gasket and sometimes a leaking intake manifold gasket depending on the engine design. External leaks are typically found by simple pressure...
You may still have air pockets in the cooling system. If you do not bleed out the air it will still overheat. After bleeding all the air out of the engine and heater core then see if it still overheats....
Hello, thank you for writing in. The cooling system does not always rely on the overflow reservoir that you can see into. Most of the coolant is stored in the radiator when it is off. This is also known as...
Hello, thank you for writing in. Overheating issues are very frustrating. When in this situation, you will want to go ahead and test the radiator cap and make sure it is regulating pressure correctly. Secondly, the water pump needs to...
Hello. A P2181 cooling system code is really generic, and all it means is that the cooling system is too hot or too cold. Unfortunately that does not give you much to work with. Check the level of your coolant,...
