OBD Cold Start Fuel Pressure Performance Bank 2
What it means
P05FC stands for Cold Start Fuel Pressure Performance Bank 2. P05FC is a P code, so the fault sits in the engine, transmission and emissions systems. For P05FC, the second digit places it in speed and idle control. For P05FC, work through the cause list below, cheapest checks first.
What to check first
For P05FC, check the bank 2 reading against the other bank before buying parts, since if only one side is out of range that side is the fault.
Check these first
- P05FC: Faulty sensor or actuator in the control circuit
- P05FC: Wiring, connector, or fuse problem for the affected output
- P05FC: Low or unstable system voltage from the battery or charging system
- P05FC: Failed PCM/ECM or a software error
- P05FC: Poor ground connection for the control module
What to do next
P05FC is a fault in the speed and idle control system. The steps below are general, so what actually failed on your vehicle may not be what P05FC names.
- P05FC: Verify battery voltage and charging system health first
- P05FC: Read all related module codes with an OBD-II scanner
- P05FC: Inspect wiring, connectors, and grounds for the affected circuit
- P05FC: Test the sensor or actuator with live data and actuation commands
- P05FC: Check for PCM software updates or TSBs before replacing modules
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Updated
Generic SAE J2012 definition. Last updated 2026-08-30.