Transmission Fluid Pressure Sensor/Switch D Circuit Intermittent

Where it lives

For P0879, the circuit described runs through the sensor. The description of P0879 reports a fault at the sensor.

Check these first

• A sensor D connector with loose pins
• Chafed wiring along the sensor D run
• A sensor D that drops out when warm
• Debris in the transmission fluid
• A TCM fault

What to do next

1. Road test and watch sensor D pressure
2. Wiggle test the sensor D wiring and connector
3. Check the fluid level and condition
4. Reread sensor D while hot
5. Replace sensor D if the signal cuts out
6. Clear the code and retest

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