Primary Diagnosis
Cylinder 1 Misfire — Likely Ignition Coil
High confidence — Proceed with repair
Evidence & Reasoning
P0301 + P0171 together suggest ignition-related lean condition.
Freeze frame at 3200 RPM, 68% load points to weak spark under load.
Check Fuse #7 (Ignition Coil) and Fuse #12 (Fuel Injectors) first.
Related DiagramsPhase 1
⚡Fuse #7 — Ignition Coil (15A)
fuse diagram
◐Ignition Coil #1 Circuit Diagram
Phase 2
◉Coil-on-Plug Location — Cyl 1
component diagram
◎ECM → Ignition Module Path
topology diagram
ADAS Awareness
AEBACCLKALDWRDMAHBBSM
Honda Sensing
Ignition coil replacement does NOT affect ADAS sensors.
No ADAS action needed.
Wiring Circuit Path
AI describes circuit path ↓
Fuse #7 (15A) → ECM C12 (PNK/BLK)
→ Coil #1 Pin 1
GND: Pin 2 → G201 (LF fender)
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