The different code represents the gears having the problem. P0729-P0736: This range of codes that report the same error: gear issues. It’s time for an output speed sensor replacement. It lets the TCM know how fast the input shaft is moving. If you’re having a boggy speedometer, you may see this code. P0720: Your speedometer reads the speed using speed sensors. This code could be due to a corroded wire or may require input speed sensor replacement. It lets the processor know if the car is in the right gear. P0715: Your automatic transmission vehicle sends signals constantly with the TCM. An issue with the transmission range sensor will bring up this code. It also informs whether or not the gear is in neutral for the car to start. P0706: Transmission range sensor communicates with the TCM letting it know the shifts of the gear lever. Usually, when your car has this code, the check engine light will also come on. P0700: The most common cause for this code is a faulty TCM. It could perhaps be due to a recent change in any of these components resulting in incompatibility issues. P0614: This code indicates that the Engine Control Module (ECM) and Transmission Control Module (TCM) are incompatible with each other. P0613: This code tells you that there is a fault within the circuitry or the processor. However, if the transmission fluid is okay, there must be an issue with the temperature sensor. P0218: This refers to an overheated transmission due to low or dirty transmission fluid. But if it doesn’t stop the symptoms (very likely to happen when the fluid is completely black), you need to rebuild the whole transmission.Ĭommon transmission fault codes causing AT light to come onĪs a mechanic, whenever my “Mazda customers” have the AT light, I’m about 90% sure the list below is the case. Replacing the oil filter is another common solution. A complete transmission flush is the first option (very risky, you should let a mechanic decide if your car needs that or not). The problems causing AT light must be something else.ĭark red (in the middle): you need to change the fluid.īrown or black (on the left): at this point, something bad might already happen to your transmission system. There are 3 basic transmission fluid colors you’ll get:īright red (on the right of the picture): the fluid is good. If the transmission fluid is OK, the next thing you want to check is its color.įollowing the instruction of the video above, you can also check for the transmission fluid color. However, taking the vehicle to a mechanic to replace the gasket will cost upwards of $150. Replacing gaskets is relatively cheap as well and will cost you $20 to $45. Using transmission stop leak fluid for minor leaks is an additional $10 to $12. Depending on the brand, you may be looking at around $20 – $50 per gallon of transmission fluid. Topping up your transmission fluid is inexpensive. Check Price at Amazon How much does it cost?
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