P1181 Fuel Delivery System Malfunction High
What does P1181 mean on a Ford?
P1181 — Fuel Delivery System Malfunction High. This Ford-enhanced code applies to F-150, Explorer, Ranger, Taurus.
Common causes of P1181
- Stuck fuel pressure regulator
- Blocked return line on return-style systems
- Sensor biased high
- Shorted sensor signal wire
- PCM command fault
How to fix P1181
- Verify pressure with a gauge
- Check return line flow where applicable
- Test regulator operation
- Inspect sensor wiring for shorts
- Replace the regulator or sensor per gauge proof