If you replaced the MAF sensor then the problem is probably not the air temp sensor, but stranger things have happened. Here are some diagrams to help you out. First of all pull the connector off of the mass air flow sensoe and check the pins in the connector. Make sure the are all installed correctly. If they are using the diagrams below do a resistance reading through the sensor for the air temp. The chart will tell you what your reading should be depending on the current air temp. If you are not in spec then you have a bad sensor. If they are in spec you will need to pull the connector off of the engine computer and do an ohms reading through the two wires that go between the air temp sensor and the computer. Pull the connector off of the computer and again check the pins to make sure they are ok. If not fix them if they are hook up your dvom and check continuity of the wires between the sensor and computer. If they check out ok your computer is probably faulty. If you don't have a reading of less than 5 ohms you have a broken wire or bad connection betwwen the two items. Also chek for continuity between the two wires to make sure they are not shorted together. If your code reader shows data you might be able to check to see what temp the computer is showing. Since it is a 2004 model it may be under warranty unless your mileage is to high, but some dealers will work with you to get it covered.
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