P0308
Sistema
Powertrain (Engine)
Scanner richiesto
Basic OBD2 code reader (engine codes, live data, smog readiness)

Cylinder 8 Misfire Detected

Understand P0308, common causes, and the right FOXWELL scanner to diagnose it.

The ECU detected repeated misfires on cylinder 8 only. Unlike P0300 (random/multiple misfire), P0308 points to a specific cylinder — spark, fuel, or compression on that bore.

Sintomi comuni

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

Cause tipiche

  • Worn spark plug or failed ignition coil on cylinder 8
  • Clogged or leaking fuel injector for cylinder 8
  • Low compression on cylinder 8 (valve, ring, or head gasket)
  • Vacuum leak affecting one runner (intake gasket, cracked hose)
  • Loose or damaged coil-on-plug boot on cylinder 8

Quale scanner ti serve?

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

Usa dati live e freeze frame prima di sostituire componenti. I codici ABS, SRS e U richiedono spesso uno scanner mult sistema.

Consigli diagnostici

  • Registra il freeze frame quando il codice compare la prima volta
  • Cancella il codice solo dopo aver risolto la causa
  • Controlla i codici pending correlati
  • Verifica che la batteria sia sopra 12,4 V prima di sospettare un sensore

Scanner FOXWELL consigliati

Domande frequenti

Can I diagnose P0308 with a basic code reader?
Yes — P0308 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 P0308?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.