Error code

OBD2 P0626

OBD2P0626
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Generator Field/F Terminal Circuit High.

Severity

moderateCan drive but may experience electrical system issues.

Summary

P0626 indicates an abnormally high voltage in the generator field coil circuit. This issue is related to the alternator's internal components and wiring.

Symptoms

  • No specific symptoms mentioned, but a malfunctioning alternator can cause battery issues or electrical system problems.

Common Causes

  • Defective voltage regulator
  • Faulty rectifier
  • Damaged, burnt, shorted, or corroded wiring and connectors in the field coil control circuit
  • Poor contact between the battery negative terminal and post

Diagnosis

  1. Check for blown fuses or fusible links in the charging system.
  2. Inspect wiring and connectors in the field coil control circuit for damage.
  3. Test the voltage regulator and rectifier for proper function.
  4. Verify battery connections are secure and free of corrosion.

Fixes

  • Replace defective components such as the voltage regulator or rectifier.

FAQ

Can I drive with P0626?

Yes, but you may experience electrical system issues and should address it soon.

What causes P0626?

Common causes include a faulty voltage regulator or rectifier, damaged wiring, and poor battery connections.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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