P0875 moderate

Transmission Fluid Pressure Sensor/Switch D Circuit

The P0875 code means the vehicle's onboard diagnostic system has detected: Transmission Fluid Pressure Sensor/Switch D Circuit. This is a moderate severity code.

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Keep driving?
Short distances only
DIY difficulty
hard
Estimated cost
$150 - $600 (parts and labor)
Check Your Fluid First
ANCEL AD310 OBD-II Scanner

Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.

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Read Transmission Codes
LAUNCH CRP123X (Reads All Systems)

Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.

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Common Symptoms

  • Check Engine Light illuminated
  • Erratic shifting in certain gear ranges
  • Transmission slip or flare during specific shifts
  • Possible limp mode activation

Probable Causes (Ranked by Likelihood)

  • Faulty transmission fluid pressure sensor D Very High
  • Wiring fault in pressure sensor D circuit High
  • Corroded or damaged connector at sensor D Moderate
  • Internal valve body passage blockage at sensor D tap Low

Step-by-Step Diagnostic Procedure

  1. Check transmission fluid level and condition

  2. Monitor pressure sensor D data on a scan tool

  3. Inspect wiring and connector at pressure sensor D

  4. Compare sensor D readings to other pressure sensors for consistency

Frequently Asked Questions

Why does my transmission have four pressure sensors?

Advanced transmissions with 9 or 10 speeds use multiple pressure sensors for precise control of different clutch packs and hydraulic circuits. Sensor D monitors a fourth pressure point.

Is sensor D more critical than sensors A, B, or C?

Each sensor monitors a different circuit and all are important for proper shift control. The severity depends on which clutch pack or circuit sensor D monitors in your specific transmission.

Is P0875 diagnosed the same way as other pressure sensor codes?

Yes, the diagnostic process is the same: check fluid level, monitor sensor data, inspect wiring, and test the sensor if needed.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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