P1243 Buick Injector Circuit Cylinder 8 Intermittent

P1244 Buick Alternator Load Input Failed High

Possible causes
  • GEN-MON circuit short to B+.
  • GEN-COM circuit short to B+.
  • B+ open prior to start-up.
  • Open GEN-COM prior to start-up.
  • Open I-line prior to start-up.
  • 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)
    P1244 Buick 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 high when a battery short to ground exists.

    Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick Rainier – Buick Rendezvous – Buick Terraza – Buick Riviera