Codes P0303, P0341 and P1000

Hi,

P0303 -- Cylinder 3 misfire

P0341 -- Camshaft position sensor (A) intake cam correlation issue with crankshaft position sensor.

P1000 -- Emission readiness monitors not complete

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The P1000 is likely the result of clearing codes or disconnecting the battery. That leaves us with the other two.

I need to clarify something. You mentioned the clutch. Does it seem to be slipping? In other words, the engine revs but the vehicle doesn't accelerate.

Have you pulled the number 3 spark plug to check it?

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In all honesty, I suspect the misfire (p0303) which is causing the loss of power is likely related to the camshaft position sensor. However, I would pull the spark plug to inspect it. Also, you will need to remove the coil pack to that cylinder to access the plug. Do me a favor. Switch cylinder 3 coil pack with one of the others so we can check if the misfire changes cylinders. If it does, then we know the coil is bad.

Here are the directions. If possible, take a pic of the spark plug end from cylinder 3 and upload it for me to see. The attached pic correlates with these directions. Also note the directions are for all cylinders. In this case, we only need to remove the number 3 plug.

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2010 Honda Accord L4-2.4L
Removal and Replacement
Vehicle Powertrain Management Ignition System Spark Plug Service and Repair Removal and Replacement
REMOVAL AND REPLACEMENT
Ignition Coil and Spark Plug Removal/Installation

1. Remove the ignition coil cover (A).

Pic 1

2. Disconnect the ignition coil connectors (B), then remove the ignition coils (C).

3. Remove the spark plug and inspect them See: Spark Plug > Component Tests and General Diagnostics.

4. Apply a small amount of anti-seize compound to the plugs into the cylinder head, finger tight. Toque them to 18 Nm (1.8 kg-m, 13 lb-ft).

5. Install the ignition coils, then connect the ignition coil connectors.

6. Install the ignition coil cover.

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2010 Honda Accord L4-2.4L
DTC Troubleshooting
Vehicle ALL Diagnostic Trouble Codes ( DTC ) Testing and Inspection P Code Charts P0341 DTC Troubleshooting
DTC TROUBLESHOOTING
DTC Troubleshooting: P0341, P0341

DTC P0341:

CMP Sensor A and CKP Sensor Incorrect Phase Detected

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information See: Computers and Control Systems > Initial Inspection and Diagnostic Overview.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Test-drive at a steady speed between 19-38 mph (30-60 km/h) for 10 minutes.

4. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0341 indicated?

YES -

Go to step 9.

NO -

Go to step 5.

5. Do the VTC TEST in the INSPECTION MENU with the HDS.

Is the result OK?

YES -

Go to step 6.

NO -

Go to step 9.

6. Test-drive at a steady speed between 19-38 mph (30-60 km/h) for 10 minutes.

7. Check the VTC STATUS in the DATA LIST with the HDS.

Does it indicate ON?

YES -

Go to step 8.

NO -

Go to step 6 and recheck.

8. Monitor the OBD STATUS for DTC P0341 in the DTCs MENU with the HDS.

Does the screen indicate FAILED?

YES -

Go to step 9.

NO -

If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM. If the screen indicates NOT COMPLETED, go to step 6 and recheck.

9. Turn the ignition switch to LOCK (0).

10. Test the VTC oil control solenoid valve See: Variable Valve Timing Actuator > Removal and Replacement > VTC Oil Control Solenoid Valve Removal/Test/Installation.

Is the VTC oil control solenoid valve OK?

YES -

Go to step 11.

NO -

Replace the VTC oil control solenoid valve See: Variable Valve Timing Actuator > Removal and Replacement > VTC Oil Control Solenoid Valve Removal/Test/Installation, then go to step 14.

11. Check the camshaft timing See: Valve Clearance > Adjustments > Valve Clearance Adjustment (Except PZEV Models).

Is the camshaft timing OK?

YES -

Go to step 12.

NO -

Reset the camshaft timing See: Valve Clearance > Adjustments > Valve Clearance Adjustment (Except PZEV Models), then go to step 14.

12. Check for damage or stretch at the cam chain See: Timing Chain > Component Tests and General Diagnostics > Cam Chain Inspection (Except PZEV Models).

Is the cam chain damaged or stretched?

YES -

Replace the cam chain See: Timing Chain > Removal and Replacement > Cam Chain Removal (Except PZEV Models) and the auto-tensioner See: Timing Chain Tensioner > Removal and Replacement > Cam Chain Auto-Tensioner Removal and Installation (Except PZEV Models), then go to step 14.

NO -

Go to step 13.

13. Inspect the VTC actuator See: Cylinder Head Assembly > Overhaul > VTC Actuator Inspection (Except PZEV Models).

Is the actuator OK?

YES -

Go to step 14.

NO -

Replace the VTC actuator See: Cylinder Head Assembly > Overhaul > VTC Actuator, Exhaust Camshaft Sprocket Replacement (Except PZEV Models), then go to step 14.

14. Turn the ignition switch to ON (II).

15. Reset the ECM/PCM with the HDS.

16. Do the ECM/PCM idle learn procedure See: Engine Control Module > Programming and Relearning > ECM/PCM Idle Learn Procedure.

17. Do the CKP pattern clear/CKP pattern learn procedure See: Computers and Control Systems > Initial Inspection and Diagnostic Overview.

18. Test-drive at a steady speed between 19-38 mph (30-60 km/h) for 10 minutes.

19. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0341 indicated?

YES -

Check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM, then go to step 1.

NO -

Go to step 20.

20. Monitor the OBD STATUS for DTC P0341 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES -

Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 19, go to the indicated DTC's troubleshooting.

NO -

If the screen indicates FAILED, check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 18.

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Let me know what you find.

Take care,
Joe