DTC P0201, P0204 (2.4 L Engine) (2017 2018 2019)

DTC P0201  : No. 1 Cylinder Injector Circuit Malfunction DTC P0204  : No. 4 Cylinder Injector Circuit Malfunction

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Start the engine (If the engine does not start, crank the engine for 20 seconds).

   -5. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC
   P0201 No. 1 Cylinder Injector Circuit Malfunction
   P0204 No. 4 Cylinder Injector Circuit Malfunction

   Is DTC P0201 or P0204 indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the injector and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot .

2. Engine starting check

   -1. Try to start the engine.

   Does the engine start?

   YES 

   Go to step 10.

   NO 

   Go to step 3.

3. Relay check

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

   -2. Remove the injector relay .

   -3. Test the injector relay .

   Is the relay OK?

   YES 

   The injector relay is OK. Go to step 4.

   NO 

   Replace the injector relay.

4. Open wire check (FI MAIN RLY OUT line)

   -1. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode
   	Injector relay: disconnected
   Test point 1	Injector relay 4P socket (female terminals) No. 3:
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   The FI MAIN RLY OUT wire is OK. Go to step 5.

   NO 

   Repair an open in the FI MAIN RLY OUT wire between PGM-FI main relay 1 and the injector relay.

5. Open wire check (+B INJ line)

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

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

   Test condition	Vehicle OFF (LOCK) mode
   	Injector relay: disconnected
   Test point 1	Injector relay 4P socket (female terminals) No. 1:
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   The +B INJ wire is OK. Go to step 7.

   NO 

   Go to step 6.

6. Fuse check

   -1. Check the following fuse.

   Fuse	No. A10 (20 A)
   Location	Under-hood fuse/relay box

   Is the fuse OK?

   YES 

   Repair an open in the +B INJ wire between the No. A10 (20 A) fuse and the injector relay. If needed, replace the under-hood fuse/relay box .

   NO 

   Repair a short in the +B INJ wire between the No. A10 (20 A) fuse and the injector relay. If needed, replace the under-hood fuse/relay box . Also replace the No. A10 (20 A) fuse.

7. Determine possible failure area (INJ RLY CL- line, others)

   -1. Turn the vehicle to ON mode, and measure the voltage between test points 1 and 2 momentarily.

   Test condition	Momentarily after ON mode
   	Injector relay: disconnected
   Test point 1	Injector relay 4P socket (female terminals) No. 3:
   Test point 2	Injector relay 4P socket (female terminals) No. 4:

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

   Is there battery voltage momentarily?

   YES 

   Go to step 9.

   NO 

   Go to step 8.

8. Open wire check (INJ RLY CL- line)

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

   -2. Jump the SCS line with the HDS, and wait more than 1 minute.

   -3. Disconnect the following connector.

   PCM connector A (51P)

   -4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Injector relay: disconnected
   	PCM connector A (51P): disconnected
   Test point 1	Injector relay 4P socket (female terminals) No. 4:
   Test point 2	PCM connector A (51P) No. 15

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

   Is there continuity?

   YES 

   The INJ RLY CL- wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

   NO 

   Repair an open in the INJ RLY CL- wire between the PCM (A15) and the injector relay.

9. Open wire check (INJ RLY OUT line)

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

   -2. Connect terminals A and B with a jumper wire.

   Terminal A	Injector relay 4P socket (female terminals) No. 1:
   Terminal B	Injector relay 4P socket (female terminals) No. 2:

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

   -3. Jump the SCS line with the HDS, and wait more than 1 minute.

   -4. Disconnect the following connector.

   PCM connector A (51P)

   -5. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Injector relay: disconnected
   	Injector relay 4P socket terminal No. 1 and No. 2: jumped
   	PCM connector A (51P): disconnected
   Test point 1	PCM connector A (51P) No. 6
   Test point 2	Body ground

   Test point 1	PCM connector A (51P) No. 7
   Test point 2	Body ground

   Are there battery voltage?

   YES 

   The INJ RLY OUT wire is OK. Go to step 10.

   NO 

   Repair an open in the INJ RLY OUT wire between the PCM (A6, A7) and the injector relay.

10. DTC check

    -1. Check the indicated DTC in step 1.

    Is DTC P0201 indicated?

    YES 

    Go to step 11.

    NO 

    Go to step 19.

11. Open wire check (INJ H1, INJ L1 line)

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

    -2. Reinstall the injector relay.

    -3. Jump the SCS line with the HDS, and wait more than 1 minute.

    -4. Disconnect the following connector.

    PCM connector B (51P)

    -5. Check for continuity between test points 1 and 2.

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    Test point 1	PCM connector B (51P) No. 1
    Test point 2	PCM connector B (51P) No. 2

    Is there continuity?

    YES 

    The INJ H1 and INJ L1 wires are not open. Go to step 14.

    NO 

    Go to step 12.

12. Open wire check (INJ H1 line)

    -1. Disconnect the following connector.

    No. 1 injector 2P connector

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

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 1 injector 2P connector: disconnected
    Test point 1	No. 1 injector 2P connector (female terminals) No. 2:
    Test point 2	PCM connector B (51P) No. 1

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

    Is there continuity?

    YES 

    The INJ H1 wire is OK. Go to step 13.

    NO 

    Repair an open in the INJ H1 wire between the PCM (B1) and the No. 1 injector.

13. Open wire check (INJ L1 line)

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

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 1 injector 2P connector: disconnected
    Test point 1	No. 1 injector 2P connector (female terminals) No. 1:
    Test point 2	PCM connector B (51P) No. 2

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

    Is there continuity?

    YES 

    The INJ L1 wire is OK. Replace the No. 1 injector .

    NO 

    Repair an open in the INJ L1 wire between the PCM (B2) and the No. 1 injector.

14. Shorted wire check (INJ H1 line to power)

    -1. Disconnect the following connector.

    No. 1 injector 2P connector

    -2. Turn the vehicle to the ON mode.

    -3. Measure the voltage between test points 1 and 2.

    Test condition	Vehicle ON mode
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 1 injector 2P connector: disconnected
    Test point 1	PCM connector B (51P) No. 1
    Test point 2	Body ground

    Is there any voltage?

    YES 

    Repair a short to power in the INJ H1 wire between the PCM (B1) and the No. 1 injector.

    NO 

    Go to step 15.

15. Shorted wire check (INJ L1 line to power)

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

    Test condition	Vehicle ON mode
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 1 injector 2P connector: disconnected
    Test point 1	PCM connector B (51P) No. 2
    Test point 2	Body ground

    Is there any voltage?

    YES 

    Repair a short to power in the INJ L1 wire between the PCM (B2) and the No. 1 injector.

    NO 

    Go to step 16.

16. Shorted wire check (INJ H1 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
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 1 injector 2P connector: disconnected
    Test point 1	PCM connector B (51P) No. 1
    Test point 2	Body ground

    Is there continuity?

    YES 

    Repair a short in the INJ H1 wire between the PCM (B1) and the No. 1 injector.

    NO 

    The INJ H1 wire is OK. Go to step 17.

17. Shorted wire check (INJ L1)

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

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 1 injector 2P connector: disconnected
    Test point 1	PCM connector B (51P) No. 2
    Test point 2	Body ground

    Is there continuity?

    YES 

    Repair a short in the INJ L1 wire between the PCM (B2) and the No. 1 injector.

    NO 

    The INJ L1 wire is OK. Go to step 18.

18. Shorted wire check (INJ H4 line)

    -1. Disconnect the following connector.

    No. 4 injector 2P connector

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

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 1 injector 2P connector: disconnected
    	No. 4 injector 2P connector: disconnected
    Test point 1	PCM connector B (51P) No. 3
    Test point 2	Body ground

    Is there continuity?

    YES 

    Repair a short in the INJ H4 wire between the PCM (B3) and the No. 4 injector.

    NO 

    The INJH4 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

19. Open wire check (INJ H4, INJ L4 line)

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

    -2. Reinstall the injector relay.

    -3. Jump the SCS line with the HDS, and wait more than 1 minute.

    -4. Disconnect the following connector.

    PCM connector B (51P)

    -5. Check for continuity between test points 1 and 2.

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    Test point 1	PCM connector B (51P) No. 3
    Test point 2	PCM connector B (51P) No. 4

    Is there continuity?

    YES 

    The INJ H4 and INJ L4 wires are not open. Go to step 22.

    NO 

    Go to step 20.

20. Open wire check (INJ H4 line)

    -1. Disconnect the following connector.

    No. 4 injector 2P connector

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

    Test condition	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 4 injector 2P connector: disconnected
    Test circuit	INJ H4
    Test point 1	No. 4 injector 2P connector (female terminals) No. 2:
    Test point 2	PCM connector B (51P) No. 3

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

    Is there continuity?

    YES 

    The INJ H4 wire is OK. Go to step 21.

    NO 

    Repair an open in the INJ H4 wire between the PCM (B3) and the No. 4 injector.

21. Open wire check (INJ L4 line)

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

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 4 injector 2P connector: disconnected
    Test point 1	No. 4 injector 2P connector (female terminals) No. 1:
    Test point 2	PCM connector B (51P) No. 4

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

    Is there continuity?

    YES 

    The INJ L4 wire is OK. Replace the No. 4 injector .

    NO 

    Repair an open in the INJ L4 wire between the PCM (B4) and the No. 4 injector.

22. Shorted wire check (INJ H4 line to power)

    -1. Disconnect the following connector.

    No. 4 injector 2P connector

    -2. Turn the vehicle to the ON mode.

    -3. Measure the voltage between test points 1 and 2.

    Test condition	Vehicle ON mode
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 4 injector 2P connector: disconnected
    Test point 1	PCM connector B (51P) No. 3
    Test point 2	Body ground

    Is there voltage?

    YES 

    Repair a short to power in the INJ H4 wire between the PCM (B3) and the No. 4 injector.

    NO 

    Go to step 23.

23. Shorted wire check (INJ L4 line to power)

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

    Test condition	Vehicle ON mode
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 4 injector 2P connector: disconnected
    Test point 1	PCM connector B (51P) No. 4
    Test point 2	Body ground

    Is there voltage?

    YES 

    Repair a short to power in the INJ L4 wire between the PCM (B4) and the No. 4 injector.

    NO 

    Go to step 24.

24. Shorted wire check (INJ H4 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
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 4 injector 2P connector: disconnected
    Test point 1	PCM connector B (51P) No. 3
    Test point 2	Body ground

    Is there continuity?

    YES 

    Repair a short in the INJ H4 wire between the PCM (B3) and the No. 4 injector.

    NO 

    The INJ H4 wire is OK. Go to step 25.

25. Shorted wire check (INJ L4)

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

    Test condition	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 4 injector 2P connector: disconnected
    Test point 1	PCM connector B (51P) No. 4
    Test point 2	Body ground

    Is there continuity?

    YES 

    Repair a short in the INJ L4 wire between the PCM (B4) and the No. 4 injector.

    NO 

    The INJ L4 wire is OK. Go to step 26.

26. Shorted wire check (INJ H1 line)

    -1. Disconnect the following connector.

    No. 1 injector 2P connector

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

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (51P): disconnected
    	PCM connector B (51P): disconnected
    	No. 1 injector 2P connector: disconnected
    	No. 4 injector 2P connector: disconnected
    Test point 1	PCM connector B (51P) No. 1
    Test point 2	Body ground

    Is there continuity?

    YES 

    Repair a short in the INJ H1 wire between the PCM (B1) and the No. 1 injector.

    NO 

    The INJH1 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .