OBD
P2CA0
Fuel Pressure Regulator D Exceeded Control Limits - Pressure Too Low
What it means
P2CA0 means Fuel Pressure Regulator D Exceeded Control Limits - Pressure Too Low.
Check these first
- A fuel pressure regulator D stuck open
- A weak fuel pump feeding regulator D
- A clogged fuel filter
- A leaking regulator D diaphragm
What to do next
- Read fuel pressure on a scan tool
- Check fuel pressure at the rail
- Replace the fuel filter and recheck
- Test fuel pressure regulator D for a leak
- Replace fuel pressure regulator D if pressure stays low
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.