DC/DC Converter Temperature Sensor A High

Where it lives

For P0C3B, the description names the sensor as the part involved.

Check these first

• A DC/DC converter temperature sensor A reading above its normal range
• A short to voltage in the sensor A circuit
• A DC/DC converter running hot under load
• A weak converter cooling system

What to do next

1. Read DC/DC converter temperature sensor A on a scan tool
2. Test the sensor A circuit for a short to voltage
3. Check the converter cooling and vents
4. Measure sensor A resistance against spec
5. Replace sensor A if the converter is running cool
6. Clear the code and retest

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