Transmission Park Position Sensor/Switch A Circuit Intermittent/Erratic

Where it lives

For P07B7, the circuit described runs through the sensor. The description of P07B7 reports a fault at the sensor.

Check these first

• A park position switch A connector losing contact
• A worn park position switch A
• Chafed switch A wiring
• A PCM fault on the switch A input
• Low battery voltage

What to do next

1. Road test and watch park position switch A data
2. Wiggle test the switch A connector and harness
3. Check the switch A signal in each gear
4. Check the battery voltage and ground
5. Replace the switch if the signal drops
6. Clear the code and retest

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