P1276 Buick Cylinder #6 High To Low Side Open

P1277 Buick Cylinder #7 High To Low Side Open

Possible causes
  • Fuel injector No. 7 output circuit short to voltage.
  • Injector.
  • NG Module.
    • Symptoms
    – Engine Light ON (or Service Engine Soon Warning Light)
    P1277 Buick Description

    Indicates a high voltage condition exists at the injector output of the NG module for cylinder No. 7 when low voltage is expected.

    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