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2005 Mazda 3- ECT Sensor Replacement
03-13-2013, 05:03 PM
Post: #1
2005 Mazda 3- ECT Sensor Replacement
I have a 2005 mazda 3 with 80500 miles. The check transmission light came on, and i went and ran the code. It came back saying that the ECT sensor needed to be replaced. I dont know how difficult this kind of fix is, and where the sensor is located. Any help would be great!
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03-13-2013, 10:14 PM
Post: #2
RE: 2005 Mazda 3- ECT Sensor Replacement
I think that we need more information. What was used to check the codes? A full function scanner or a code reader? Most “code readers” won’t access the transmission module.

I need all of the code NUMBERS that were found. There can be several numbers that give information about a single sensor. If you had a parts store check the codes with a code reader they usually just tell you that you need whatever part they found a number for. Without more information that may not be the case.

An “ECT” code is usually an “Engine Coolant Temperature” sensor code. Although the temperature sensor alone can be the cause of a transmission problem there should also be a transmission code if the transmission light is on. Without all of the code numbers you could be just “changing parts” instead of fixing the problem.

So, what would help the most is to have ALL of the code NUMBERS retrieved with a full function scanner. Record all of the codes, have the computer cleared & post the codes here for review.

Thanks for using the forum,
Garner

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03-13-2013, 10:25 PM
Post: #3
RE: 2005 Mazda 3- ECT Sensor Replacement
To elaborate further, engine coolant temp is used in conjunction with other sensing, which prevents the trany from going into lock-up (of the torque converter) before things are fully warmed up. This is where more info is needed because it may be as simple as the engine thermostat gone bad and the engine running cooler than normal. Generally speaking there are at least two (2) coolant sensors on the engine. One for the dash gauge (idiot light?) and one for the computer. There may also be one in the trany to warn of excessive temp. This is where the exact code(s) will help us out.
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