Ford Fault Code

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P0711

Harsh Cold Shifts / Erratic Shift Points

System

Fluid Temp

Symptom

Harsh Cold Shifts / Erratic Shift Points

Diagnosis & fix steps

LOGIC: Transmission Fluid Temperature (TFT) Sensor Range / Performance. ACTION: Scan TFT live data during warm-up; check for static values (stuck at -40°C or jumping erratically). Drop the pan and replace the internal molded lead frame / harness assembly containing the integrated thermistor.

Red Seal field insights

Lead Frame Thermistor Drift: The internal molded plastic lead frame houses the temperature thermistor. Thermal cycling causes cold solder fractures or thermistor drift, blinding the TCM to true fluid viscosity changes.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

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Read before you touch anything

  • This is general reference information, not a repair manual. It is for trained, qualified technicians.
  • Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
  • Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
  • You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
  • Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

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