P0301
System
Powertrain (Engine)
Benötigter Scanner
Basic OBD2 code reader (engine codes, live data, smog readiness)

Cylinder 1 Misfire Detected

Understand P0301, common causes, and the right FOXWELL scanner to diagnose it.

The ECU detected repeated misfires on cylinder 1 only. Unlike P0300 (random/multiple misfire), P0301 points to a specific cylinder — spark, fuel, or compression on that bore.

Häufige Symptome

  • Rough idle that may feel rhythmic
  • Loss of power under load
  • Check engine light (steady or flashing)
  • Possible fuel smell from unburned fuel

Typische Ursachen

  • Worn spark plug or failed ignition coil on cylinder 1
  • Clogged or leaking fuel injector for cylinder 1
  • Low compression on cylinder 1 (valve, ring, or head gasket)
  • Vacuum leak affecting one runner (intake gasket, cracked hose)
  • Loose or damaged coil-on-plug boot on cylinder 1

Welchen Scanner brauchen Sie?

Basic OBD2 code reader (engine codes, live data, smog readiness)

Nutzen Sie Live-Daten und Freeze Frame, bevor Sie Teile tauschen. ABS-, SRS- und U-Codes erfordern meist einen Vollsystem-Scanner.

Diagnose-Tipps

  • Freeze Frame erfassen, wenn der Code erstmals gesetzt wird
  • Code erst nach Behebung der Ursache löschen
  • Auf verwandte pending codes prüfen
  • Batteriespannung über 12,4 V prüfen, bevor Sie Sensoren verdächtigen

Empfohlene FOXWELL Scanner

Häufig gestellte Fragen

Can I diagnose P0301 with a basic code reader?
Yes — P0301 is typically accessible with a basic OBD2 code reader like the FOXWELL NT201 or NT301. Live data helps confirm the repair.
Is it safe to drive with P0301?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.