Transmission Park Position Sensor/Switch A Circuit High

Where it lives

For P07B4, the sensor sits on the circuit this code reports. The description of P07B4 reports a fault at the sensor.

Check these first

• A short to voltage in the park position sensor A circuit
• A failed park position sensor A reading high
• Corrosion or water in the sensor A connector
• A chafed sensor A harness shorting to power
• A failed PCM park position input

What to do next

1. Read park position switch A state on a scan tool in each gear
2. Test the park position sensor A circuit for a short to voltage
3. Inspect the sensor A connector for corrosion or water
4. Check the sensor A reference voltage against spec
5. Replace park position sensor A if the circuit tests good
6. Clear the code and retest

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