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2002 FORD THUNDERBIRD
3.9L DOHC V8 (252 hp)•FWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor974Torque985Fluid14DTC1870Battery2Maintenance0Recalls2
P1740moderate severityPowertrain

Torque Converter Clutch Inductive Signature Malfunction

on 2002 Ford Thunderbird 3.9L DOHC V8 (252 hp) · FWD

What this code means

The TCC solenoid did not move when the PCM commanded it. This is an information code — there should be a more specific code stored in the Transmission Control Module. The TCC solenoid circuit performance is not as expected.

Symptoms

  • Check Engine Light
  • TCC not engaging
  • Reduced fuel economy on highway
  • Transmission overheating at highway speeds

Common causes

  • Faulty TCC solenoid
  • Wiring issue to TCC solenoid
  • Low transmission fluid
  • Internal transmission blockage
  • Contaminated transmission fluid

Diagnostic steps

  1. Check for additional transmission DTCs in TCM
  2. Test TCC solenoid resistance
  3. Inspect TCC solenoid wiring
  4. Check transmission fluid level and condition

Repair notes

Check for companion DTCs. Replace TCC solenoid if faulty. Service transmission fluid.

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