Service Bulletin
A16-034
June 23, 2016
03948 Version 1
MIL Comes On with DTC P0300, P0301, P0302, P0303, P0304
AFFECTED VEHICLES
| Year | Model | Trim | VIN Range |
| 2015 | Fit | ALL | ALL |
| 2016 | Fit | ALL | 3HG……GM700001 thru 3HG……GM704625
JHM……GX000001 thru JHM……GX026880 |
SYMPTOM
The MIL comes on with DTC P0300 (random misfire detected) or P0301–P0304 (cylinder misfire detected).
PROBABLE CAUSE
The ignition coil, spark plug, or fuel injector on one or more cylinders may be affecting combustion.
CORRECTIVE ACTION
Replace the applicable part(s) based on the diagnosis.
PARTS INFORMATION
| Part Name | Part Number | Quantity |
| Ignition Coil | 30520-5R0-013
Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API | (As needed) |
| Spark Plug | 12290-5R0-003
Genuine Honda 12290-5R0-003 Spark Plug (Dilzkar7C11S) (Ngk)
Last update on 2026-06-19 / Affiliate links / Images from Amazon Product Advertising API | (As needed) |
| Fuel Injector Set | 16010-5R1-315 | 1 |
| Fuel Joint Pipe Set | 16012-5R1-305
Genuine Honda 16012-5R1-305 Fuel Joint Pipe Set
Last update on 2026-06-19 / Affiliate links / Images from Amazon Product Advertising API | 1 |
| Throttle Body Gasket | 17107-5R0-004
Genuine Honda 17107-5R0-004 Throttle Body Gasket
Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API | 1 |
WARRANTY CLAIM INFORMATION
The normal warranty applies.
NOTE:
- If you are replacing ignition coil(s) and the vehicle is eligible for S/B 15-060, Safety Recall: Ignition Coils, submit warranty claims using the warranty claim information from that bulletin.
- DTCs are required with claim submission.
| Operation Number | Description | Flat Rate Time | Defect Code | Symptom Code | Template ID | Failed Part Number |
| 1215M8 | Misfire diagnosis. | 0.3 hr | 03214 | 09107 | 16-034A | 30520-5R0-013
Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API |
| Diagnosis will determine only one of the following repairs may be necessary for this bulletin. | ||||||
| A | Replace ignition coil(s) – add | 0.2 hr | 03214 | 09107 | 16-034B | |
| B | Replace spark plug(s) – add | 0.3 hr | 03214 | 09107 | 16-034C | |
| C | Replace fuel injectors (no test-drive required) – add | 1.8 hrs | 03214 | 09107 | 16-034D | |
| D | Replace fuel injectors (with-test drive) – add | 2.1 hrs | 03214 | 09107 | 16-034E | |
Skill Level: Repair Technician
DIAGNOSIS AND REPAIR PROCEDURE
Check the iN VIN status to see if the vehicle is eligible for S/B 15-060, Safety Recall: Ignition Coils. Is the vehicle eligible for recall?
- If the safety recall has not been done, go to Vehicles Eligible for Recall.
- If the vehicle is not part of the recall, or the recall has been done, go to Vehicles Not Eligible for Recall or Recall is Complete.
Vehicles Eligible for Recall
- Record what cylinder the misfire is on. Let the vehicle cool down to room temperature.
- Swap the ignition coil and spark plug of the misfiring cylinder to one of the other cylinders in order to see if the misfire moves. (For example: If the misfire is on cylinder 1, swap ignition coil 1 and 2, then swap spark plug 1 and 3.) Refer to the ignition coil and spark plug removal and installation procedure in the service information.
- Let the vehicle idle to see if the misfire moves.
- If the misfire moved with the ignition coil, do S/B 15-060. The repair is complete.
- If the misfire moved with the spark plug, replace the affected spark plug. Refer to the ignition coil and spark plug removal and installation procedure in the service information. Then do S/B 15-060. The repair is complete.
- If the misfire did not move, go to step 5.
- If the misfire did not return, go to step 4.
- Test-drive the vehicle at low speed with low accelerator input (preferably on a slight uphill incline). Did the misfire return? (Check for pending DTCs)
- If the misfire returned, go to step 5.
- If the misfire did not return, this bulletin does not apply. Do S/B 15-060, then continue with normal misfire troubleshooting.
- Replace the fuel injectors. Refer to the injector removal and installation procedure in the service information.
- Do S/B 15-060. The repair is complete.
NOTE: In some rare cases the vehicle may return, at which point check and adjust the valves.
Vehicles Not Eligible for Recall or Recall is Complete
- Record what cylinder the misfire is on. Let the vehicle cool down to room temperature.
- Swap the ignition coil and spark plug of the misfiring cylinder to one of the other cylinders in order to see if the misfire moves. (For example: If the misfire is on cylinder 1, swap ignition coil 1 and 2 then swap spark plug 1 and 3.) Refer to the ignition coil and spark plug removal and installation procedure in the service information.
- Let the vehicle idle to see if the misfire moves.
- If the misfire moved, replace the affected ignition coil or spark plug. Refer to the ignition coil and spark plug removal and installation procedure in the service information. The repair is complete.
- If the misfire did not move, go to step 5.
- If the misfire did not return, go to step 4.
- Test-drive the vehicle at low speed with low accelerator input (preferably on a slight uphill incline). Did the misfire return? (Check for pending DTCs)
- If the misfire returned, go to step 5.
- If the misfire did not return, this bulletin does not apply. Continue with normal misfire troubleshooting.
- Replace the fuel injectors. Refer to the injector removal and installation procedure in the service information. The repair is complete.
NOTE: In some rare cases the vehicle may return, at which point check and adjust the valves.
END
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