Transmission Fluid Pressure Sensor/Switch D Circuit
What does P0875 mean?
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.
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
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Check transmission fluid level and condition
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Monitor pressure sensor D data on a scan tool
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Inspect wiring and connector at pressure sensor D
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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.