Honda 2004 Odyssey Service Manual page 443

PGM-FI System
DTC Troubleshooting (cont'd)
DTC P0301 '99-00, '02-04 Models:
Cylinder Misfire Detected
DTC P0302 '99-00, '02-04 Models:
Cylinder Misfire Detected
DTC P0303 '99-00, '02-04 Models:
Cylinder Misfire Detected
DTC P0304 '99-00, '02-04 Models:
Cylinder Misfire Detected
DTC P0305 '99-00, '02-04 Models:
Cylinder Misfire Detected
DTC P0306 '99-00, '02-04 Models:
Cylinder Misfire Detected
NOTE: Information marked with an asterisk ( ) applies
to '02-04 models.
1. Remove the intake manifold cover and the ignition
coil cover (see steps 11 and 12 on page 6-36).
2. After checking and recording the freeze data, reset
the PCM (see page 11-4). If there is no freeze data of
the misfire, just clear the DTC.
3. Start the engine, and listen for a clicking sound
from the injector at the problem cylinder.
Does the injector click?
YES Go to step 4.
NO Go to step 31.
4. Turn the ignition switch OFF.
5. Exchange the ignition coil from the problem
cylinder with one from another cylinder.
6. Test-drive the vehicle several times in the range of
the freeze data or under various conditions if there
was no freeze data.
11-134
No. 1
7. Check for a DTC or Temporary DTC with the scan
tool or the HDS.
No. 2
Is DT C P0301, P0302, P0303, P0304, P0305, or
P0306, or T emporary DT C P1399 indicated?
No. 3
YES
NO
No. 4
ignition coil connector (no misfire at this time).
8. Determine which cylinder had the misfire.
No. 5
Does the misf ire occur in the cylinder where the
ignition coil was exchanged?
No. 6
YES
NO
9. Turn the ignition switch OFF.
10. Exchange the spark plug from the problem cylinder
with one from another cylinder.
11. Test-drive the vehicle several times in the range of
the freeze data or under various conditions if there
was no freeze data.
12. Check for a DTC or Temporary DTC with the
scan tool or the HDS.
Is DT C P0301, P0302, P0303, P0304, P0305, or
P0306, or T emporary DT C P1399 indicated?
YES
NO
etc. (no misfire at this time).
13. Determine which cylinder had the misfire.
Does the misf ire occur in the cylinder where the
spark plug was exchanged?
YES
NO
Go to step 8.
Intermittent misfire due to poor contact at the
Replace the faulty ignition coil.
Go to step 9.
Go to step 13.
Intermittent misfire due to spark plug fouling,
Replace the faulty spark plug.
Go to step 14.