P1231 — Mercury: High Speed Fuel Pump Relay Activated

Code breakdown

Manufacturer-specific meanings (Mercury)

• Fiat
  Circuito basso secondario pompa carburante, alta velocità (VLCM)
• BuickCadillacChevroletChryslerGMGMCOldsmobileSaturn
  Injector Circuit Cylinder 4 Intermittent
• FordLincolnMercury
  High Speed Fuel Pump Relay Activated
• Volkswagen
  Cylinder 7 Injector Circuit Short To Ground

Related codes

• P1200 — Manufacturer-specific fault code
• P1200-buick — Injector Control Circuit
• P1200-cadillac — Injector Control Circuit
• P1200-chevrolet — Injector Control Circuit
• P1200-chrysler — Injector Control Circuit
• P1200-gm — Injector Control Circuit

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