P1321
System
Powertrain (Ignition)
Scanner som krävs
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.

Vanliga symptom

  • Misfire cylinder 1
  • Rough idle
  • P0301

Typiska orsaker

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

Vilken scanner behöver du?

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

Använd live-data och freeze frame innan du byter delar. ABS-, SRS- och U-koder kräver oftast en fullsystems-scanner.

Diagnostiktips

  • Spara freeze frame när koden först sätts
  • Rensa koden först efter att orsaken är åtgärdad
  • Kontrollera relaterade väntande koder
  • Verifiera batterispänning över 12,4 V innan du misstänker sensorer

Rekommenderade FOXWELL-scannrar

Vanliga frågor

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.