Transmission Fluid Pressure Sensor/Switch E Circuit Low

Where it lives

For P0989, the circuit described runs through the sensor. The description of P0989 reports a fault at the sensor.

Check these first

• A short to ground in the transmission fluid pressure sensor E circuit
• Low transmission fluid level
• A leaking transmission seal or line
• A transmission fluid pressure sensor E that is failing
• A weak transmission pump

What to do next

1. Read transmission fluid pressure sensor E voltage on a scan tool
2. Check the fluid level for a leak
3. Check the circuit for a short to ground
4. Compare sensor E pressure to a gauge
5. Replace the sensor if the low signal persists
6. Clear the code and retest

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