Transmission Fluid Temperature Sensor Out of Self-Test Range (Ford)
What does P1711 mean?
The P1711 code means the vehicle's onboard diagnostic system has detected: Transmission Fluid Temperature Sensor Out of Self-Test Range (Ford). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Harsh shifting when cold
- Transmission not reaching lockup
- Delayed shifts on cold startup
- Abnormal TFT reading on scan tool
Probable Causes (Ranked by Likelihood)
- TFT sensor reading out of expected range during self-test Very High
- Self-test performed when transmission was not at proper temperature High
- Corroded or loose TFT sensor connector Moderate
- TFT sensor internal resistance drift Low
Step-by-Step Diagnostic Procedure
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Perform the self-test only when the transmission fluid is between 150-200F as required by Ford procedure.
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Compare scan tool TFT reading to actual fluid temperature measured with a thermometer.
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Check the TFT sensor connector for proper connection and corrosion.
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Measure sensor resistance at known temperatures and compare to Ford specifications.
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If readings are consistently off, replace the TFT sensor.
Frequently Asked Questions
What temperature should the transmission be for self-test?
Ford requires the transmission fluid to be between 150-200F for accurate self-test results. Running the engine and driving briefly before testing ensures proper temperature.
Can cold weather trigger this code?
Yes. If the self-test runs before the transmission warms up, the TFT reading will be out of the expected range and set this code.
Is this code the same as P0710?
No. P1711 is Ford-specific and relates to self-test conditions, while P0710 is a generic OBD-II code for general TFT sensor circuit issues.