DC/DC Converter Current Sensor A Circuit Intermittent/Erratic

Where it lives

For P0E55, the sensor sits on the circuit this code reports. The description of P0E55 reports a fault at the sensor.

Check these first

• A loose or backed-out pin in the converter current sensor A connector
• A sensor A with an intermittent internal connection
• Vibration rubbing the sensor A wiring
• Moisture in the connector making the signal jump

What to do next

1. Watch the converter current sensor A while wiggling the connector
2. Inspect the connector for loose pins and corrosion
3. Check the sensor A wiring for rubs and chafing
4. Compare the reading under steady load
5. Service the converter if the signal stays erratic
6. Clear the code and retest

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