Ford P1105: Dual Alternator Upper Fault (Monitor)

Is your scanner showing Ford P1105?
No worries. We'll show you what it means and how to deal with it.

Presented by
Randy Worner

Ford P1105: Dual Alternator Upper Fault (Monitor)

OVERVIEW
Severity
:
Medium
DIY Difficulty Level
:
Intermediate
Repair Cost
:
$350-$400
Can I Still Drive?
:
Yes (Short-term only)

What Does The Ford P1105 Code Mean?

Key on or engine running; and the PCM detected an unexpected voltage condition on the Dual Alternator Upper circuit during the test.

What Are The Potential Causes Of The Ford P1105 Code?

  • Dual Alternator Upper circuit connection problem (corrosion)
  • Dual Alternator Upper monitor circuit open or shorted to ground
  • Dual Alternator is damaged or it has failed
  • PCM has failed

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Alternator Warranty REMANUFACTURED. Top. Dual Heavy Duty Alternators. Extra Heavy Duty Alternator
>>> Cardone 78-4937 Remanufactured Ford Engine Control Module (ECM) / Computer (Renewed)

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

Ford P1105, DTCDECODE.

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