Transmission Fluid Pressure Sensor/Switch E Circuit High

Where it lives

For P0990, the circuit described runs through the sensor. The description of P0990 reports a fault at the sensor.

Check these first

• A short to power in the transmission fluid pressure sensor E circuit
• An open in the sensor E return
• A transmission fluid pressure sensor E that is faulty
• A clogged transmission filter
• A PCM fault

What to do next

1. Read transmission fluid pressure sensor E voltage on a scan tool
2. Check the circuit for a short to power
3. Measure sensor E reference voltage
4. Check the filter and fluid condition
5. Replace the sensor if the reading is fixed high
6. Clear the code and retest

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