DC/DC Converter Temperature Sensor B Low

Where it lives

For P0C3F, the part to look at first is the sensor named here.

Check these first

• A DC/DC converter temperature sensor B reading below its normal range
• A short to ground in the sensor B circuit
• A DC/DC converter running hot from a blockage
• A vehicle computer misreading the sensor B signal

What to do next

1. Read DC/DC converter temperature sensor B on a scan tool
2. Test the sensor B circuit for a short to ground
3. Check the converter for blockages and cooling
4. Measure sensor B resistance against spec
5. Replace sensor B if it reads low across the range
6. Clear the code and retest

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