Transmission Fluid Pressure Sensor/Switch D Circuit Low

Where it lives

For P0877, the circuit described runs through the sensor. The description of P0877 reports a fault at the sensor.

Check these first

• A short to ground in the sensor D signal wire
• A sensor D reading below the expected range
• Low transmission fluid level
• Debris holding the sensor D port open

What to do next

1. Check the transmission fluid level
2. Watch sensor D pressure on a scan tool
3. Test the signal wire for a short to ground
4. Inspect the sensor D port for debris
5. Replace sensor D if the value stays low
6. Clear the code and retest

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