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2004 BUICK PARK AVENUE
3.8L Supercharged V6•FWD•AUTOMATIC•gas•supercharged
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Repairs0Labor470Torque1520Fluid7DTC1825Battery1Maintenance0Recalls0
B1328moderate severityBody

Device Power 1 Circuit High Voltage

on 2004 Buick Park Avenue 3.8L Supercharged V6 · FWD

What this code means

The module is reading higher than expected voltage on its device power supply circuit. Usually points to a charging system fault or wiring short to power.

Symptoms

  • Warning lights on
  • Erratic module operation
  • Charging system warning

Common causes

  • Overcharging alternator
  • Wiring short to voltage
  • Faulty voltage regulator
  • Failed module

Diagnostic steps

  1. Check charging system output voltage
  2. Measure device power voltage at connector
  3. Inspect wiring for short to power
  4. Repair source of overvoltage
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