P1142 — Ford — Fuel Restriction Condition

P1142 (Ford): Fuel Restriction Condition — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Fuel Restriction Condition. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain

Symptoms

  • Engine hesitation under load
  • Noticeable power loss
  • Engine misfires
  • Hard starting
  • Rough idle

Possible causes

  • Clogged fuel filter
  • Failing fuel pump
  • Kinked or blocked fuel supply line
  • Faulty fuel pressure regulator
  • Fuel rail pressure sensor malfunction

What to check

  • Inspect fuel lines for physical kinks or blockages
  • Measure fuel pump pressure using a pressure gauge
  • Replace the fuel filter if maintenance history is unknown
  • Test fuel pressure regulator vacuum lines for leaks
  • Scan live data for fuel rail pressure readings