Transmission Park Position Sensor/Switch B Circuit Intermittent/Erratic

Where it lives

For P07BD, the sensor sits on the circuit this code reports. The description of P07BD reports a fault at the sensor.

Check these first

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

What to do next

1. Road test and watch park position switch B data
2. Wiggle test the switch B connector and harness
3. Check the switch B 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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