P0622 – Generator Field Control Circuit

Description

The ECM detects a malfunction in the generator field control circuit.

Need More Than Just the Fault Code?

A diagnostic scanner with live data, freeze-frame information and the right system access can help you investigate the actual cause before replacing parts.

Compare Diagnostic Scanners

Symptoms

  • Battery light on
  • Low voltage
  • Stalling

Causes

  • Faulty alternator
  • Wiring issues
  • Poor grounds

Diagnosis

  • Check alternator field control
  • Inspect wiring
  • Test charging system

Repair

  • Replace alternator
  • Repair wiring

Related Problems