misfire
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Diagnostic Workspace2019 Honda Civic EX • Bay 3
⌘KSearch codes, specs, fuses...
Connected
Map
Topo
ADAS
●OK●W●F
EngineADASTransFr. BrakesRr. BrakesExhaustElectricalCoolingFuelSteeringHVACLightingCoil #1Coil #2
RPMrpm
1,850
Coolant°C
92
Speedkm/h
65
Throttle%
18
STFT B1%
8.6
BatteryV
14.2
DTCs
1 Critical2 Warning
P0301critical
Cylinder 1 Misfire Detected
P0171warning
System Too Lean (Bank 1)
P0420warning
Catalyst Efficiency Below Threshold
Freeze Frame
Engine Load
68.2%
RPM
3,200
Speed
72 km/h
STFT B1
+8.6%
LTFT B1
+4.2%
Coolant
88°C
⚡ Fuse MapUnder-Hood
#1
15A
Low Beam (L)
#2
15A
Low Beam (R)
#3
10A
High Beam (L)
#4
10A
High Beam (R)
#5
10A
DRL
#6
7.5A
Backup Lights
#7
15A
Ignition Coil
#8
30A
ABS Motor
#9
10A
A/C Clutch
#10
30A
Blower Motor
#11
7.5A
A/C Control
#12
20A
Fuel Injectors
#13
10A
Alternator
#14
30A
EPS Motor
#15
20A
Transmission
#16
15A
Horn
#17
10A
ECM/PCM
#18
15A
O2 Sensors
#19
10A
EVAP
#20
15A
Fuel Pump
#21
10A
MAF Sensor
#22
20A
Starter
#23
10A
VSA (Stability)
#24
7.5A
Brake Switch
#25
20A
Rad Fan 1
#26
30A
Rad Fan 2
#27
10A
Rear Defog
#28
7.5A
Wipers
#29
30A
Rear Window
#30
10A
Sunroof
#31
15A
Ign Switch
#32
10A
Cruise Ctrl
#33
20A
TCM Power
#34
10A
TPMS
#35
10A
ADAS Camera
#36
10A
BSM Radar
#37
10A
Collision Warn
#38
15A
USB/Aux
#39
20A
Power Outlet
#40
30A
Main Relay
◐ Wiring
◎ Topology
AI circuit path ↓
Fuse #7 (15A) → ECM C12 (PNK/BLK) → Coil #1 Pin 1 GND: Pin 2 → G201 (LF fender)
Phase 2: OEM wiring diagrams via ALLDATA/Mitchell
AI INTELLIGENCEOpus
Primary Diagnosis
Cylinder 1 Misfire — Likely Ignition Coil
87%
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. STFT +8.6% consistent with cylinder not firing.
Diagrams
⚡Fuse #7 — Ignition Coil (15A)→
◐Ignition Coil #1 Circuit Diagram→
◉Coil-on-Plug Location — Cyl 1→
◎ECM → Ignition Module Path→
ADAS
AEBACCLKALDWRDMAHBBSM
Honda Sensing
Ignition coil replacement does NOT affect ADAS sensors.
No ADAS action needed.
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