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1997 TOYOTA 4RUNNER
3.4L V6•RWD•AUTOMATIC•gas
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor509Torque3204Fluid8DTC1656Battery1Maintenance0Recalls4
P0877moderate severityPowertrain

Transmission Fluid Pressure Sensor/Switch D Circuit Low

on 1997 Toyota 4Runner 3.4L V6 · RWD

What this code means

The transmission fluid pressure sensor D circuit is reporting a voltage that is too low. This can indicate a short circuit or an actual pressure loss.

Symptoms

  • Transmission slipping
  • Delayed engagement
  • Fault light illuminated

Common causes

  • Low transmission fluid
  • Short to ground in wiring
  • Failed pressure sensor
  • Internal pump or seal leak

Diagnostic steps

  1. Verify fluid level
  2. Check circuit for short to ground
  3. Measure sensor voltage
  4. Perform hydraulic pressure test
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