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2004 FORD TAURUS
3.0L V6 Vulcan•FWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor487Torque3354Fluid7DTC1721Battery1Maintenance0Recalls2
P0640moderate severityPowertrain

Intake Air Heater Control Circuit

on 2004 Ford Taurus 3.0L V6 Vulcan · FWD

What this code means

The PCM detected a fault in the intake air heater control circuit. This can affect cold starting, especially on diesel engines.

Symptoms

  • Hard cold starts
  • Check engine light on
  • Rough running when cold

Common causes

  • Faulty intake air heater
  • Damaged heater control wiring
  • Faulty heater relay
  • Faulty PCM

Diagnostic steps

  1. Scan for intake heater codes
  2. Inspect heater wiring and relay
  3. Test intake air heater resistance
  4. Repair circuit or replace heater
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