Diagnosing P0301 & P0302 on a Dodge Charger
P0301 (Cylinder 1 Misfire) ve P0302 (Cylinder 2 Misfire) kodlari, Charger’in PCM’inin o silindirlerde yanmanin tamamlanmadigini algiladigi anlamina gelir. Bu rehber, iki kodu ayni anda gordugunuzde nereden baslamaniz gerektigini adim adim anlatir.
- Applies to: 3.6L Pentastar plus 5.7L and 6.4L HEMI Charger models.
- First steps: Log codes and freeze-frame data (coolant temp, load, short/long fuel trims).
- Tools: OBD-II scanner, multimeter, spark tester, compression gauge, smoke tester.
P0301/P0302 Diagnostic Checklist
- Coil ve bujileri degistir: Silindir 1 ve 2’deki coil/bujileri baska silindirlerle yer degistirin. Kod yer degistiriyorsa coil veya buji arizalidir.
- Inspect boots: Replace boots showing carbon tracking or oil intrusion; apply dielectric grease sparingly.
- Injector test: Use a noid light to confirm pulse; clean or replace injectors if flow is restricted.
- Vakum kacaklari: Smoke test ile emme manifoldu ve PCV hattini kontrol edin. Kacaklar lean karisima ve misfire’a yol acar.
- Compression/valvetrain: Verify compression stays within +/-10 psi. Inspect HEMI lifters and cam lobes for wear.
- ECM/TIPM baglantilari: Korozyon veya gevsek pinler coil driver sinyalini kesebilir-konektorleri temizleyin.
When to See a Mechanic
- Flashing MIL with raw fuel smell, backfiring, or heavy power loss.
- P0301/P0302 returning immediately after coil, plug, and injector swaps.
- Low compression, valve-train noise, or metal in the oil when misfire persists.
After You Clear the Codes
- Sorun cozuldukten sonra Mode $04$ ile kodu silin, 30-50 km karisik surus yaparak readiness monitorlerini tamamlayin.
- Misfire rakamlarini Mode $06$ verisinden takip edin; 0’a yakinsa onarim basarilidir.
- If the MIL returns, repeat the swap test and run a leak-down test to rule out mechanical faults.