P1245 Acura Alternator Load Input Failed Low

P1245 Acura Alternator Load Input Failed Low

Possible causes
  • GEN-COM circuit short to GND.
  • GEN-MON circuit short to GND.
  • Open B+ wire during operation.
  • Low system voltage.
  • Broken generator belt.
  • Damaged generator/regulator assembly.
  • Damaged PCM.

    • Tech description
  • Verify the battery voltage is 14.5 volts.
  • Verify the generator/regulator has the correct part number.

    • Symptoms
    – Engine Light ON (or Service Engine Soon Warning Light)
    P1245 Acura Description

    The PCM monitors generator load from the generator/regulator in the form of frequency. The fault indicates the input is lower than the load should be in normal operation. The load input could be low when no generator output exists.

    Acura Vehicle:

    Acura ILX, Acura MDX, Acura RDX, Acura RLX, Acura TL, Acura TSX, Acura ZDX, Acura CSX, Acura EL, Acura Integra, Acura RSX, Acura Legend, Acura Vigor, Acura CL, Acura SLX, Acura NSX, Acura RL, Acura ZDX