P0712 Code: Transmission Fluid Temperature Sensor “A” Circuit Low

The transmission fluid temperature sensor is a negative temperature coefficient (NTC) sensor that’s used to measure transaxle fluid temperature. This thermistor decreases in resistance as sensor temperature increases. The powertrain control module (PCM) supplies the thermistor with a reference voltage to vary its resistance. If the PCM notices a problem with the transmission fluid temperature sensor, a code P0712 will be logged by on-board diagnostics.

What Does the P0712 Code Mean?

Diagnostic trouble code P0712 stands for “Transmission Fluid Temperature Sensor ‘A’ Circuit Low.”

The transmission fluid temperature sensor is located inside the transmission oil pan. The PCM uses the signals from the thermistor to delay shift points when the transmission fluid is cold, control line pressure, and operate the torque converter clutch or TCC.

If the PCM detects a problem with the transmission fluid temperature sensor, improper TCC operation and incorrect line pressure can occur, affecting the vehicle’s overall performance.

Note: The definition of code P0712 might be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0712 Code?

• Transmission fluid temperature sensor failure
• Transmission control module failure
• Wiring issue
• PCM failure
• Transmission problems

What are the Common Symptoms of the P0712 Code?

• Illuminated check engine light
• Transmission might not shift properly
• Illuminated transmission temperature warning light
• Vehicle stuck in limp mode
• Harsh or delayed shifting
• Improper torque converter clutch operation

How to Diagnose the P0712 Code

DTC P0712 is a generic powertrain code that can be logged in vehicles equipped with an OBD-II system. While this might be the case, keep in mind that the steps for diagnosis and repair can vary, depending on vehicle specifications. If you’re not familiar with the process of diagnosing trouble codes, it’s best to have a professional do it for you instead. Otherwise, you can go ahead and do it on your own.

How to Fix the P0712 Code

Attempting to resolve a P0712 code without the right tools and technical knowledge can be tricky and might even lead to further complications if done incorrectly. Under these circumstances, it’s best to bring your vehicle to the nearest repair shop instead. Having your vehicle inspected by a certified professional can ensure that all steps and protocols are followed correctly.

But if you’ve had your fair share of resolving trouble codes without much help, make sure you have the right manual before proceeding. Keep in mind that there’s no magic bullet that works for all makes and models. So before you begin, you might want to check out guides like those from Chilton or an ALLDATA subscription to get vehicle-specific repair information.