Transmission Fluid Temperature Sensor Circuit High Input
Your transmission fluid temperature sensor is sending a signal that's too high, like a broken thermometer that always reads 'boiling hot.' The ECU thinks the fluid is hotter than it actually is, which can cause transmission shifting problems.
The ECU monitors voltage from the transmission fluid temperature sensor, which should decrease as fluid temperature increases. A high input voltage means the ECU detects an abnormally cold signal, indicating either a sensor failure, open circuit, or wiring issue. When voltage exceeds the maximum threshold, the fault code triggers.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Sensor Voltage | 0.5-4.5V (proportional to fluid temp) | >4.5V or open circuit condition |
| Fluid Temperature Signal | -40°C to +150°C range | Signal reads below minimum valid range |
Code P0714 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P0714 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.