P0714 Transmission Fluid Temperature Sensor "A" Circuit Intermittent

The P0714 – Transmission Fluid Temperature Sensor "A" Circuit Intermittent diagnostic trouble code (DTC) indicates that the transmission control module (TCM) has detected an intermittent or unstable signal from the Transmission Fluid Temperature (TFT) Sensor "A".

The TFT sensor monitors the temperature of the transmission fluid and sends this information to the transmission control system. The TCM uses the temperature signal to adjust shift timing, hydraulic pressure, torque converter clutch operation, and other transmission functions.

The key word in P0714 is “Intermittent.” This means the signal is not necessarily missing all the time. Instead, the TCM may see the correct temperature value for a while and then suddenly detect an implausible value, a signal interruption, or a rapid temperature change.

What Does P0714 Mean?

In simple terms:

The transmission control module is receiving a temperature signal from TFT Sensor "A", but the signal periodically becomes unreliable or disappears.

The normal process is:

Transmission fluid temperature changes → TFT sensor measures temperature → Sensor changes its electrical signal → TCM reads the signal → Signal intermittently becomes abnormal → P0714 is stored

The exact sensor design varies between vehicles and transmissions.

What Is the Transmission Fluid Temperature Sensor?

The Transmission Fluid Temperature Sensor (TFT) measures the temperature of the transmission fluid.

On many vehicles, the TFT sensor is an NTC thermistor. Its electrical resistance changes according to fluid temperature.

The TCM uses this information to determine whether the transmission is:

• Cold

• At normal operating temperature

• Overheating

Transmission fluid temperature is important because fluid viscosity changes considerably with temperature.

Why Is Transmission Fluid Temperature Important?

The TCM uses fluid temperature information to modify transmission operation.

Temperature data can affect:

• Shift timing

• Shift pressure

• Torque converter clutch operation

• Transmission warm-up strategy

• Line pressure

• Gear selection

• Overheat protection

• Transmission diagnostic calculations

For example, a cold transmission may require different shift behavior than a transmission operating at normal temperature.

Symptoms of P0714

An intermittent TFT signal may cause different symptoms depending on when the fault occurs.

Possible symptoms include:

Check Engine Light

The malfunction indicator lamp may illuminate.

Erratic shifting

The transmission may shift differently from one moment to another.

Harsh shifting

The TCM may increase hydraulic pressure if it believes the transmission temperature is abnormal.

Delayed shifting

Shift timing may change because the controller cannot accurately determine transmission temperature.

Torque converter clutch problems

TCC engagement may be modified.

Transmission enters limp mode

Some vehicles may activate a protective strategy.

Incorrect transmission temperature reading

A scan tool may show sudden or unrealistic temperature changes.

Reduced fuel economy

Incorrect temperature information can affect shift and torque converter strategies.

Transmission overheating warnings

Some vehicles may display a warning if the TCM interprets the signal as an overheating condition.

What Causes P0714?

Several problems can cause an intermittent TFT signal.

Faulty Transmission Fluid Temperature Sensor

The sensor may have an internal intermittent fault.

Damaged wiring

A partially broken wire can intermittently lose electrical contact.

Loose connector

Vibration can cause the connection to open and close.

Corroded terminals

Corrosion can create unstable electrical resistance.

Oil or fluid contamination

Transmission fluid can enter a damaged connector or wiring area.

Poor electrical connection

A loose terminal may produce an intermittent signal.

Internal transmission wiring problem

On some transmissions, the TFT sensor is integrated into an internal harness or valve-body assembly.

Damaged sensor circuit

The signal wire may be shorting to ground or another circuit.

Poor sensor ground

Depending on the circuit design, a bad ground/reference can affect the temperature reading.

TCM power or ground problem

An unstable module supply can create unusual sensor readings.

TCM fault

A control-module problem is possible but should be considered only after the sensor circuit has been verified.

Can a Bad TFT Sensor Cause P0714?

Yes.

A TFT sensor can develop an intermittent internal fault.

For example, the sensor may report a normal temperature most of the time but suddenly produce an incorrect resistance value when:

• The transmission gets hot

• The vehicle vibrates

• The transmission is under load

• The sensor is exposed to fluid movement

This can cause the TCM to detect an intermittent temperature signal.

Can Wiring Cause P0714?

Yes, and wiring is one of the most important things to check.

A partially broken wire can behave normally when stationary and then lose contact when the harness moves.

Inspect for:

• Broken conductors

• Damaged insulation

• Chafing

• High resistance

• Loose terminals

• Corrosion

• Fluid contamination

An intermittent electrical problem can be much harder to find than a completely open circuit.

Can a Connector Cause P0714?

Yes.

A loose or corroded connector can cause the TFT signal to repeatedly appear and disappear.

Inspect for:

• Loose terminals

• Bent pins

• Corrosion

• Moisture

• Transmission fluid contamination

• Damaged connector locks

A connector should be inspected carefully before replacing the sensor.

Can Transmission Fluid Cause P0714?

Transmission fluid condition itself does not normally cause P0714.

However, fluid-related problems can contribute indirectly.

For example:

• Fluid contamination can affect sensor connections.

• Excessive debris can affect components around the sensor.

• Low fluid level can cause abnormal transmission temperatures.

• Severe overheating can damage electrical components.

Therefore, the fluid level and condition should be checked, but low fluid should not automatically be identified as the electrical cause of P0714.

Can Low Transmission Fluid Cause P0714?

Not usually by itself.

Low transmission fluid can cause the transmission to operate abnormally and overheat, which may affect the temperature reading.

However, an actual intermittent electrical signal generally points toward the sensor, wiring, connector, or related circuit.

Can Overheating Cause P0714?

Yes, indirectly.

Excessive transmission temperature can stress:

• Sensors

• Wiring

• Connectors

• Internal harnesses

• Valve-body components

If P0714 occurs only when the transmission is hot, temperature-dependent electrical failure should be investigated.

Can P0714 Cause Transmission Problems?

Yes.

The transmission controller depends on accurate fluid-temperature information.

If the signal repeatedly changes or disappears, the TCM may alter its strategy to protect the transmission.

This can produce:

• Harsh shifts

• Delayed shifts

• Abnormal shift timing

• TCC problems

• Limp mode

The severity depends on the vehicle's control strategy.

Does P0714 Mean the Transmission Is Bad?

No.

P0714 does not automatically indicate internal transmission failure.

The most common diagnostic path is electrical:

TFT Sensor → Connector → Wiring → Reference voltage/ground → TCM

A transmission may be mechanically healthy while an intermittent temperature sensor circuit is causing the code.

How Is P0714 Diagnosed?

The goal is to find out why the TFT signal intermittently becomes unreliable.

1. Scan all DTCs

Check for other codes related to:

• Transmission temperature

• Transmission pressure

• Shift solenoids

• Speed sensors

• Gear ratios

• TCM communication

Additional codes can help identify whether the problem is isolated to the TFT circuit.

2. Check freeze-frame data

Look at:

• Transmission temperature

• Engine temperature

• Vehicle speed

• Engine RPM

• Selected gear

• Battery voltage

The conditions under which P0714 was stored can be extremely useful.

3. Check TFT live data

Monitor the transmission temperature with a scan tool.

A healthy temperature reading should generally change gradually.

An intermittent fault may look like:

80°C → 82°C → 81°C → -40°C → 83°C

or:

90°C → 170°C → 91°C

A sudden temperature jump that is physically impossible is a strong indication of an electrical signal problem.

The exact diagnostic thresholds vary by vehicle.

Why Is Live Data So Important?

P0714 is an intermittent code.

The sensor may work perfectly when the vehicle is parked.

This means a simple static resistance test may not reveal the problem.

Monitoring live TFT data while:

• Moving the wiring harness

• Warming the transmission

• Driving the vehicle

• Changing gears

can help reproduce the fault.

Can You Test the TFT Sensor With a Multimeter?

Yes.

A multimeter can be used to measure the sensor's resistance.

Because many TFT sensors are thermistors, resistance changes with temperature.

The technician can compare the measured resistance with the manufacturer's temperature/resistance specifications.

However, an intermittent sensor can pass a stationary resistance test.

For that reason, the sensor should ideally be tested under the conditions where the fault occurs.

Can a Wiggle Test Find P0714?

Yes.

A controlled wiggle test can be useful for intermittent wiring faults.

While monitoring TFT temperature on the scan tool, gently manipulate the relevant harness and connector.

If the reported temperature suddenly changes when the harness moves, there may be:

• A broken wire

• Loose terminal

• Poor connector contact

The test should be performed carefully to avoid creating additional damage.

Can an Oscilloscope Diagnose P0714?

Yes.

An oscilloscope can reveal changes in the sensor signal that a basic multimeter may miss.

It can help identify:

• Signal dropouts

• Electrical noise

• Sudden voltage changes

• Intermittent open circuits

• Unstable reference voltage

This is especially useful when the fault occurs only briefly.

What If P0714 Appears Only When the Transmission Is Hot?

This is an important clue.

Possible causes include:

• Sensor internal failure

• Heat-sensitive wiring

• Connector expansion

• Internal transmission harness problem

• Excessive transmission temperature

The vehicle should be tested until the transmission reaches the temperature at which the fault occurs.

What If P0714 Appears Only When Driving?

A wiring or connector problem becomes more likely if the sensor works correctly while stationary.

Transmission movement and vibration can affect an unstable connection.

Inspect the harness around:

• Transmission case

• Valve body

• Transmission connector

• Internal harness

• Areas exposed to heat and movement

What If P0714 Appears During Gear Changes?

A temperature signal should not suddenly jump dramatically simply because the transmission changes gear.

If the TFT reading changes sharply during shifting, inspect the sensor circuit and wiring.

The timing of the signal change can help identify whether the fault is electrical or related to actual temperature changes.

Can P0714 Cause Limp Mode?

Yes, on some vehicles.

If the TCM cannot trust the transmission temperature information, it may activate a protective strategy.

Depending on the vehicle, this can include:

• Limited gear selection

• Higher line pressure

• Modified shift strategy

• Disabled torque converter clutch

• Reduced transmission performance

The exact behavior varies by manufacturer.

Can P0714 Cause Harsh Shifting?

Yes.

If the TCM receives an incorrect temperature signal, it may use an inappropriate shift-pressure strategy.

For example, if the controller falsely interprets the transmission as being extremely cold or hot, it may change hydraulic pressure and shift timing.

This can result in noticeably harder or unusual gear changes.

Can P0714 Cause Transmission Overheating?

It can contribute indirectly.

If the TCM receives incorrect temperature information, it may not manage transmission operation optimally.

However, an overheating transmission should also be checked for independent causes such as:

• Low fluid

• Incorrect fluid

• Restricted cooler

• Cooling-system problems

• Excessive clutch slip

• Torque converter problems

P0714 should not automatically be considered the reason for the overheating.

Is P0714 a Serious Problem?

It can become serious if ignored.

The TFT signal is important for transmission control and thermal protection.

An intermittent signal can cause incorrect transmission operation and may eventually result in:

• Harsh shifting

• Poor shift quality

• TCC problems

• Limp mode

• Excessive transmission temperature

Prompt diagnosis is recommended.

Can You Drive With P0714?

If the vehicle operates normally and the code appears only occasionally, a short drive to a repair facility may be possible.

However, continued driving is not recommended if you notice:

• Transmission overheating

• Severe shifting

• Limp mode

• Slipping

• Burning transmission-fluid smell

• Warning messages

• Major changes in transmission behavior

How Is P0714 Repaired?

The correct repair depends on the cause.

Possible repairs include:

• Replacing the Transmission Fluid Temperature Sensor

• Repairing damaged wiring

• Repairing loose terminals

• Replacing a damaged connector

• Repairing internal transmission wiring

• Restoring the sensor reference or ground circuit

• Correcting transmission overheating

• Repairing the TCM circuit when properly diagnosed

The sensor should not be replaced automatically without checking the circuit.

Does P0714 Require Transmission Repair?

Not necessarily.

A faulty sensor, connector, or wiring problem can cause P0714 without any internal transmission damage.

However, if the TFT sensor is integrated into an internal transmission harness, valve-body assembly, or other internal component, accessing the sensor may require transmission-related labor.

That still does not mean the transmission itself has mechanically failed.

Common Diagnostic Mistakes

Replacing the TFT sensor immediately

The intermittent fault may actually be in the wiring or connector.

Testing only when the transmission is cold

The problem may appear only at operating temperature.

Ignoring live data

An unstable temperature reading can provide the most important clue.

Assuming an extreme temperature is real

A sudden jump from a normal temperature to an impossible value often indicates an electrical problem.

Ignoring the connector

Loose or corroded terminals are common causes of intermittent sensor signals.

Blaming the transmission

P0714 is a temperature-sensor circuit code and does not automatically indicate mechanical transmission failure.

Replacing the TCM too quickly

The sensor circuit should be completely tested before condemning the control module.

How Do You Clear P0714?

The underlying fault should be repaired first.

Then:

Clear the DTC → Monitor TFT live data → Warm up the transmission → Drive through different operating conditions → Check for abnormal temperature jumps → Rescan

The temperature reading should change smoothly and realistically as the transmission warms and cools.

If P0714 returns, the intermittent fault has not been fully resolved.

P0714 vs. Other Transmission Temperature Codes

P0714 is part of a group of TFT-related codes.

The important distinction is:

P0710 – Transmission Fluid Temperature Sensor "A" Circuit

General circuit problem.

P0711 – Transmission Fluid Temperature Sensor "A" Circuit Range / Performance

The temperature signal is outside the expected range or does not correspond to operating conditions.

P0712 – Transmission Fluid Temperature Sensor "A" Circuit Low

The sensor circuit voltage is lower than expected.

P0713 – Transmission Fluid Temperature Sensor "A" Circuit High

The sensor circuit voltage is higher than expected.

P0714 – Transmission Fluid Temperature Sensor "A" Circuit Intermittent

The temperature signal intermittently becomes unreliable, disappears, or changes unexpectedly.

This distinction is useful when diagnosing the actual cause instead of simply replacing the sensor.

Final Thoughts on P0714

P0714 – Transmission Fluid Temperature Sensor "A" Circuit Intermittent means that the TCM has detected an intermittent problem with the transmission fluid temperature sensor signal.

The sensor itself may be defective, but the problem can also be caused by wiring, connectors, terminals, power/reference circuits, grounds, internal transmission wiring, or a TCM circuit problem.

One of the most valuable diagnostic tools for this code is live data. A normal transmission temperature should generally change gradually. If the scan tool suddenly shows an impossible temperature or a dramatic temperature jump without a corresponding physical change, an electrical problem is highly likely.

A practical diagnostic path is:

Scan all DTCs → Check freeze-frame data → Monitor TFT live data → Check transmission-fluid condition → Inspect sensor → Inspect connector → Perform a wiggle test → Test wiring and reference/ground circuits → Compare sensor resistance with specifications → Test the signal if necessary → Check internal transmission wiring → Verify TCM operation → Repair the confirmed fault → Clear the code → Road test and rescan.

Most importantly, P0714 does not automatically mean that the transmission needs to be rebuilt. An intermittent sensor connection or damaged wire can produce this code even when the transmission's internal mechanical components are operating normally.