P1321
Systeem
Powertrain (Ignition)
Scanner vereist
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Ignition Coil Power Source Circuit Low (Cylinder 1)

Understand P1321, common causes, and the right FOXWELL scanner to diagnose it.

Ignition coil supply voltage low on cylinder 1 — Nissan and others.

Veelvoorkomende symptomen

  • Misfire cylinder 1
  • Rough idle
  • P0301

Typische oorzaken

  • Short in coil power feed
  • Failed coil driver in ECM
  • Blown fuse for ignition feed

Welke scanner heb je nodig?

Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Gebruik live data en freeze frame voordat je onderdelen vervangt. ABS-, SRS- en U-codes vereisen meestal een full-system scanner.

Diagnosetips

  • Leg freeze frame vast wanneer de code voor het eerst verschijnt
  • Wis de code pas na het oplossen van de oorzaak
  • Controleer op gerelateerde pending codes
  • Controleer of accuspanning boven 12,4 V is voordat je sensoren suspecteert

Aanbevolen FOXWELL scanners

Veelgestelde vragen

Can I diagnose P1321 with a basic code reader?
P1321 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with P1321?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.