15 Honda diagnostic codes on file — with the full diagnosis, repair steps, and field insights open to read free, no signup required.
Disclaimer: General reference information for trained, qualified technicians only. Codes and procedures vary by model, serial number and software version. Always follow the manufacturer's service manual and your site's safety procedures. Use at your own risk. Not affiliated with or endorsed by any manufacturer.
Find a Honda code by searching below, or browse the table. Codes on file by system:
| Code | System | Symptom | Full fix |
|---|---|---|---|
| 12 Blinks | Fuel System | Engine Won't Start | View fix |
| 21 Blinks | Emissions | Engine Runs Normal / MIL On | View fix |
| 54 Blinks | Safety | Engine Starts then Stops | View fix |
| 7 Blinks | Cooling | Overheat Light / Hard Start | View fix |
| 8 Blinks | Intake | Poor Throttle Response | View fix |
| B1232 | Antenna / Keyless | Keyless Push-Button Start Inop | View fix |
| B12A5 | Climate Control (HVAC) | AC Only Blows Out Defrost Vents | View fix |
| B12C1 | Fuel System | Fuel Gauge Flashing | View fix |
| Code 12 | Cranking | No Start / Silent Start | View fix |
| P0107 | Air Intake | Bogging / Black Smoke | View fix |
| P0219 | Valvetrain | MIL On / Hard Cut at Cruise | View fix |
| P0505 | Air Intake | Stalling at Stop | View fix |
| P219A | Fuel System | Rough Idle / Rich Smell | View fix |
| P219A | Fuel System | Rough Shaking Idle / Intermittent Surge | View fix |
| Service Light Indicator | — | — | View fix |
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