P0714 Code: Transmission Fluid Temperature Sensor “A” Circuit Intermittent

The transmission fluid temperature (TFT) sensor measures the temperature of the hydraulic fluid in the vehicle’s automatic transmission. This device sends its readings to the powertrain control module (PCM), which uses the data to adjust various processes that improve the transmission’s performance.

The PCM will log a P0714 code if it receives an intermittent signal from the transmission fluid temperature sensor in the “ A” circuit.

What Does the P0714 Code Mean?

The diagnostic trouble code (DTC) P0714 indicates “Transmission Fluid Temperature Sensor “A” Circuit Intermittent.”

The transmission fluid temperature sensor is a negative temperature coefficient thermistor. Its internal resistance is inversely proportional to the transmission oil’s temperature. As the hydraulic fluid grows hotter, the sensor’s resistance drops. Conversely, the electrical resistance will rise as the transmission cools down.

Most TFT sensors are found in the valve body behind the transmission oil pan. Their readings are crucial to the proper operation of the automatic transmission. For example, the PCM uses input from the transmission fluid temperature sensor to adjust gear shift patterns. This makes the transition between gears as smooth as possible.

Furthermore, the TFT sensor helps mitigate the risk of the transmission overheating by acting as an input for torque converter lockup.

During operation, the PCM provides the transmission fluid temperature sensor with a reference voltage. The sensor changes its internal resistance to convert the hydraulic fluid’s temperature into a voltage signal that it returns to the controller.

The PCM regularly checks the TFT sensor. If the controller detects an intermittent problem with the transmission fluid temperature sensor, it will set the generic powertrain code P0714.

Note: The definition of code P0714 can differ according to the vehicle manufacturer. Check the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0714 Code?

• Bad transmission fluid temperature sensor
• Transmission issues
• Issues with the wiring
• Bad PCM

What are the Common Symptoms of P0714 Code?

• Check engine light illuminated
• Torque converter clutch isn’t working properly
• Delay or harshness when shifting between gears
• Vehicle goes into limp mode

How to Diagnose the P0714 Code

The P0714 code is a generic powertrain code that can be logged by various vehicle makes and models. The exact cause and symptoms can vary between cases, and so can the steps needed to fix it.

Unsure about performing diagnostic tests on your vehicle’s TFT sensor? It’s recommended to bring it to a trusted auto service center where a mechanic can look it up. Otherwise, you can go ahead and diagnose the issue yourself.

How to Fix the P0714 Code

Trying to fix a P0714 code requires the right tools and know-how to test the transmission fluid temperature sensor “A”. In most cases, it’s best to entrust the job to professional mechanics who know what they’re doing.

For DIYers with advanced technical knowledge and hands-on experience who prefer to test and replace their vehicle’s transmission fluid temperature sensors on their own, it will be helpful to rely on the appropriate repair manual or refer to an online repair database.