P1461 Buick A/C pressure sensor circuit voltage low

P1462 Buick A/C pressure sensor circuit voltage high

Possible causes
  • ACP circuit short to GND or SIGRTN.
  • VREF circuit open.
  • Damaged PCM.
  • Open ACP circuit.
  • Damaged ACP sensor.
    • Tech description
    Verify a VREF voltage between 4 and 6 volts.
    Symptoms
    – Engine Light ON (or Service Engine Soon Warning Light)
    P1462 Buick Description

    The ACP inputs a voltage to the PCM. If the voltage is below the calibrated level the DTC sets.

    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