ICC 000167.04 – Alternator Voltage Below Normal

ICC 000167.04 (ICC 167.04)

Code: 000167.04

Shortcode: 167.04


This code indicates that the alternator voltage is below normal, suggesting that the alternator is not charging the battery adequately. This could be due to a faulty alternator, issues with the voltage regulator, wiring problems, or a defective battery.


The vehicle’s electrical system may not function correctly, leading to battery drain, reduced power to electrical components, and potential starting issues. The operator might see a warning light or message on the dashboard indicating a charging system problem.


  • Test Alternator Output:
    • Use a multimeter to measure the alternator’s output voltage. Ensure it is within the manufacturer’s specified range.
    • Replace the alternator if it is not producing sufficient voltage.
  • Inspect Voltage Regulator:
    • Check the voltage regulator for proper operation. Replace it if it is faulty.
  • Examine Battery and Connections:
    • Inspect the battery terminals and cables for corrosion, loose connections, or damage.
    • Ensure the battery is in good condition and replace it if necessary.
  • Check Wiring and Connectors:
    • Inspect the wiring harness and connectors associated with the charging system for signs of damage or loose connections.
    • Repair or replace any damaged components.


Regular inspection and maintenance of the charging system, including the alternator, voltage regulator, and battery, can help prevent issues and ensure reliable vehicle operation.

Control Units: John Deere

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