DC/DC Converter Voltage Sensor C Circuit Intermittent/Erratic

Where it lives

For P0E9A, the sensor sits on the circuit this code reports. The description of P0E9A reports a fault at the sensor.

Check these first

• A voltage sensor C connector losing contact intermittently
• Chafed wiring in the sensor C harness
• A voltage sensor C failing when hot
• Loose converter ground causing an erratic signal

What to do next

1. Road test and watch DC/DC converter voltage sensor C
2. Wiggle test the sensor C connector and harness
3. Measure the sensor C signal while hot
4. Check the converter ground for tightness
5. Replace the voltage sensor C if the signal drops
6. Clear the code and retest

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