P1278 FORD - Cylinder #8 High To Low Side Open

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Fuel Injector
  • Faulty Fuel Injector Interface Module
  • Fuel Injector harness is open or shorted
  • Fuel Injector circuit poor electrical connection

Tech notes

Check valve cover wire harness connections first, including under the valve cover.

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1278 Ford Description

A fault is detected by the fuel injector interface module in the secondary (rearward) fuel injector circuit
OBDII Code P1278 Ford - Cylinder #8 High To Low Side Open - AutoCodes.com

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P1278 FORD Comments

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