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2001 RAM 1500
3.9L V6•RWD•gas•Magnum
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Repairs0Labor511Torque139Fluid9DTC1680Battery1Maintenance0Recalls0
P0718moderate severityPowertrain

Transmission Fluid Temperature Sensor Circuit Intermittent

on 2001 Ram 1500 3.9L V6 · RWD

What this code means

The transmission fluid temperature sensor is giving intermittent or erratic readings. The computer relies on this value to set shift and lockup strategy.

Symptoms

  • Inconsistent shift quality
  • Delayed torque converter lockup
  • Overheat warning appears randomly

Common causes

  • Poor connector contact
  • Damaged wiring harness
  • Faulty fluid temp sensor
  • Internal TCM fault

Diagnostic steps

  1. Retrieve codes and freeze frame data
  2. Monitor temp sensor for signal dropouts
  3. Wiggle-test harness and connector
  4. Replace sensor if reading is intermittent
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