Transmission Fluid Temperature Sensor A Circuit Intermittent
The P0714 code indicates an intermittent fault in the transmission fluid temperature (TFT) sensor circuit. The TFT sensor is a thermistor that changes resistance with temperature, and the powertrain control module (PCM) monitors its signal to adjust shift patterns and torque converter lockup. An intermittent circuit issue means the signal is erratic or drops out temporarily, often due to wiring damage, loose connectors, or a failing sensor. This can cause harsh shifting, poor fuel economy, and potential transmission damage if ignored.
01. Most Common Causes
- Faulty transmission fluid temperature sensor
- Damaged or corroded wiring/connectors in the sensor circuit
- Intermittent short or open in the circuit
- Low transmission fluid level or contaminated fluid
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or erratic shifting
- Transmission stuck in limp mode or fails to shift properly
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data to capture conditions when the fault occurred.
Step 2: Inspect the TFT sensor connector and wiring for damage, corrosion, or loose connections.
Step 3: Test the TFT sensor resistance at various temperatures using a multimeter and compare to manufacturer specifications.
Step 4: Check transmission fluid level and condition; low or dirty fluid can cause intermittent sensor readings.
Step 5: If wiring and sensor test OK, clear the code and test drive to see if it returns; if intermittent, consider replacing the sensor and repairing any wiring issues.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as intermittent sensor readings can cause harsh shifting and potential transmission damage. If the transmission enters limp mode, you may lose high gears. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, including parts and labor. A new TFT sensor costs around $20-$50, and labor is about $30-$100 depending on vehicle accessibility.