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P0713 is a diagnostic trouble code (DTC) for "Transmission Fluid Temperature Sensor Circuit High Input". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
A P0712 trouble code is related to a vehicle’s automatic transmission temperature sensor and the automatic transmission fluid itself. The sensor will constantly monitor the transmission’s temperatures and send a signal to the transmission control module (TCM). As temperatures increase, so does voltage which the TCM will read as an overheating transmission.
P0712 is an OBD-II generic code for a voltage problem with the automatic transmission temperature sensor. If this code is triggered, the TCM is reading voltage that is too high for the manufacturer’s parameters, meaning the automatic transmission fluid is too hot.
There can be a variety of causes for a P0712 – some more severe than others – but it’s important to treat this code seriously as it could lead to costly repairs if ignored. Some of the most likely causes are:
Because a P0712 could be triggered by an actual mechanical issue, you could experience poor shifting or even what’s known as “limp-mode” – a stored set of driving parameters designed to get a vehicle to a repair shop with as little damage to major components as possible. It’s likely that (if equipped) an A/T Oil Temp light will also illuminate with a P0712. If the code is caused by low fluid levels from a leak, chances are high that smoke will be visible.
There are two paths a mechanic will take with a P0712 and the one they pick will depend on how the vehicle is driving with the code. If it is shifting poorly and has an A/T Oil Temp light, chances are high the temperature sensor is doing its job and there’s a mechanical problem. Because leaks are a common cause of a P0712, a visual inspection will come next. Leaks most commonly originate from either the front seal, the oil pan, or the rear output shaft. All leaks should be repaired and fluid should be refilled with the manufacturer’s recommended variety. Depending on where the leak is, labor can be intensive as some transmissions may need to be “dropped” in order to access the leaking seal i.e. the input shaft.
However, if the transmission seems to be in fine working order, the sensor itself could be to blame. A professional multi-meter will help a mechanic determine the ground and voltage/resistance of the sensor to test it. If all the wiring appears to be intact, replacing the sensor with a high-quality part will be a mechanics next move followed by a thorough test drive to bring the transmission fluid up to operating temperature.
Transmissions can be tougher than one might let on and a P0712 doesn’t have to end with a complete transmission rebuild. Having personally dried up a transaxle (transmission with a center differential for an all-wheel drive vehicle) to the point where the vehicle would hardly move only to refill it with fluid and repair the leak to continue driving, I know how resilient these pieces of machinery are. When dealing with a P0712, it’s important to try the most obvious and least expensive repairs first before spending more money than you have to.
A P0712 can be either very serious or not that big of a deal and it all depends on what the true cause is. If the temperature sensor is working as it should, then you have an overheating transmission which needs to be addressed as soon as possible. If the sensor is faulty though, the transmission is likely fine and won’t require any repairs.
The most common repairs for a P0712 are as follows:
How the vehicle performs with a P0712 will be a big indicator of what the cause of the problem is. Make sure to tell your mechanic exactly what happens when the code is triggered, how the transmission shifts, if there are other associated warning lights, and what kind of noises can be heard. Low fluid levels will often reveal the sound of cogs rotating, and an audible “howl” will be heard under acceleration.
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