DTC P0351, P0352, P0353, P0354, P0355, P0356 (6-Speed A/T, 16-18 9-Speed A/T)

NOTE:  Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems .

DTC (PGM-FI)

1. Problem verification

   - 1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   - 3. Start the engine.

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

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0351 No. 1 Cylinder Ignition Coil Circuit Malfunction
   P0352 No. 2 Cylinder Ignition Coil Circuit Malfunction
   P0353 No. 3 Cylinder Ignition Coil Circuit Malfunction
   P0354 No. 4 Cylinder Ignition Coil Circuit Malfunction
   P0355 No. 5 Cylinder Ignition Coil Circuit Malfunction
   P0356 No. 6 Cylinder Ignition Coil Circuit Malfunction

   Is DTC P0351, P0352, P0353, P0354, P0355, and/or P0356 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the ignition coil and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot - Refer to: How to Troubleshoot the Fuel and Emissions Systems .

2. Ignition coil check

   - 1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Exchange the ignition coil from the problem cylinder with one from another cylinder.

   - 3. Start the engine.

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

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0351 No. 1 Cylinder Ignition Coil Circuit Malfunction
   P0352 No. 2 Cylinder Ignition Coil Circuit Malfunction
   P0353 No. 3 Cylinder Ignition Coil Circuit Malfunction
   P0354 No. 4 Cylinder Ignition Coil Circuit Malfunction
   P0355 No. 5 Cylinder Ignition Coil Circuit Malfunction
   P0356 No. 6 Cylinder Ignition Coil Circuit Malfunction

   Is DTC indicated at the exchanged position?

   YES 

   Replace the faulty ignition coil .

   NO 

   Go to step 3.

3. Shorted wire check (IG(IGN COIL)/IG(IGN COIL J/C)/IG COIL line)

   - 1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Check the following fuse.

   Fuse	No. A23 (15 A)
   Location	Under-hood fuse/relay box

   Is the fuse OK?

   YES 

   Go to step 4.

   NO 

   Repair a short in the IG(IGN COIL)/IG(IGN COIL J/C)/IG COIL wire between the ignition coil and the No. A23 (15 A) fuse. Also replace the No. A23 (15 A) fuse.

4. Relay circuit board check

   - 1. Remove and test the relay circuit board.

   Is the relay circuit board OK?

   YES 

   Go to step 5.

   NO 

   Replace the relay circuit board .

5. Open wire check (IG(IGN COIL)/IG(IGN COIL J/C)/IG COIL) line)

   - 1. Reinstall the relay circuit board.

   - 2. Disconnect the following connector(s).

   Ignition coil 3P connector (problem cylinder)

   - 3. Turn the vehicle to the ON mode.

   - 4. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	Ignition coil 3P connector (problem cylinder): disconnected
   Test point 1	Ignition coil 3P connector No. 1
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there battery voltage?

   YES 

   The IG(IGN COIL)/IG(IGN COIL J/C)/IG COIL wire is OK. Go to step 6.

   NO 

   Repair an open in the IG(IGN COIL)/IG(IGN COIL J/C)/IG COIL wire between the ignition coil and the relay circuit board.

6. Open wire check (PHC GND line)

   - 1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Ignition coil 3P connector (problem cylinder): disconnected
   Test point 1	Ignition coil 3P connector No. 2
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The PHC GND wires are OK. Go to step 7.

   NO 

   Repair an open in the PHC GND wire between the ignition coil and G101.

7. Shorted wire check (IGN PULSE lines)

   - 1. Jump the SCS line with the HDS, and wait more than 1 minute.

   - 2. Disconnect the following connector.

   PCM connector B (51P)

   - 3. Check for continuity between body ground and the appropriate PCM connector terminal of the problem ignition coil (see table).

   Test condition	Vehicle OFF (LOCK) mode
   	Ignition coil 3P connector (problem cylinder): disconnected
   	PCM connector B (51P): disconnected

   PROBLEM CYLINDER	DTC	CONNECTOR	TERMINAL
   No. 1	P0351	PCM connector B (51P) - Refer to: PCM Connector for Inputs and Outputs (9-Speed A/T) (2016 2017 2018), or PCM Connector for Inputs and Outputs(6-Speed A/T) (2016 2017 2018 2019 2020)	No. 41
   No. 2	P0352		No. 42
   No. 3	P0353		No. 32
   No. 4	P0354		No. 33
   No. 5	P0355		No. 21
   No. 6	P0356		No. 22

   Is there continuity?

   YES 

   Repair a short in the IGN PULSE wire between the PCM and the ignition coil.

   NO 

   The IGN PULSE wires are not shorted. Go to step 8.

8. Open wire check (IGN PULSE lines)

   - 1. Check for continuity between appropriate ignition coil 3P connector terminal No. 3 and the appropriate PCM connector terminal of the problem ignition coil (see table).

   Test condition	Vehicle OFF (LOCK) mode
   	Ignition coil 3P connector (problem cylinder): disconnected
   	PCM connector B (51P): disconnected

   PROBLEM CYLINDER	DTC	CONNECTOR	TERMINAL
   No. 1	P0351	PCM connector B (51P) - Refer to: PCM Connector for Inputs and Outputs (9-Speed A/T) (2016 2017 2018), or PCM Connector for Inputs and Outputs(6-Speed A/T) (2016 2017 2018 2019 2020)	No. 41
   No. 2	P0352		No. 42
   No. 3	P0353		No. 32
   No. 4	P0354		No. 33
   No. 5	P0355		No. 21
   No. 6	P0356		No. 22

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The IGN PULSE wires are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good PCM - Refer to: PCM Removal and Installation (6-Speed A/T), ('16-'18 9-Speed A/T) .

   NO 

   Repair an open in the IGN PULSE wire between the PCM and the ignition coil.