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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
P1650low severityPowertrain

PSP Switch Out of Self-Test Range

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

What this code means

The Power Steering Pressure switch is not within the expected range during the KOER self-test. The PSP switch tells the PCM when the steering is being turned so it can increase idle speed to prevent stalling.

Symptoms

  • Check Engine Light
  • Self-test failure
  • Engine may stall when turning steering wheel at idle

Common causes

  • PSP switch not actuated during test (steering wheel must be turned)
  • Faulty PSP switch
  • Wiring issue
  • Low power steering fluid

Diagnostic steps

  1. Turn steering wheel during KOER self-test
  2. Test PSP switch operation
  3. Check power steering fluid level
  4. Inspect PSP switch wiring

Repair notes

Turn steering wheel during self-test. Replace PSP switch if faulty.

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