OBD
P04C2
Fuel Fill Door Unlock Control Circuit High
What it means
P04C2 means Fuel Fill Door Unlock Control Circuit High.
Check these first
- A short to power in the fuel door unlock control circuit
- A failed fuel door unlock actuator
- A chafed fuel door unlock wire
- A faulty body control module driver
What to do next
- Check the fuel door unlock control circuit for a short to power
- Test the fuel door unlock actuator
- Inspect the fuel door unlock wire for chafing
- Replace the fuel door unlock actuator if the circuit reads high
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.