P0714: 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 this 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 a loose connection, damaged wiring, or a failing sensor. This can cause the PCM to use a default temperature value, leading to harsh shifts or limp mode.
1. 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
2. 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
3. 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 pins; repair as needed.
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; top off or replace if necessary.
Step 5: If the sensor and wiring are good, clear the code and test drive to see if it returns; if intermittent, consider replacing the sensor.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with P0714, as the transmission may shift erratically or enter limp mode, potentially causing further damage. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a DIY sensor replacement, or $150 to $300 if a shop performs the repair, including parts and labor.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.