P0873
PowertrainTransmission Pressuremoderate severityTransmission Fluid Pressure Sensor/Switch C Circuit High
What P0873 Means
The transmission fluid pressure sensor C circuit is reporting a voltage that is too high. This usually indicates an open circuit or a sensor fault.
Symptoms
- Erratic shifting
- Transmission fault light
- Poor shift quality
Common Causes
- Open circuit in wiring
- Failed pressure sensor
- Corroded connector
- Internal transmission fault
Diagnostic Steps
- Inspect wiring for open circuit
- Check connector for corrosion
- Measure sensor voltage with scan tool
- Compare reading to actual pressure
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