DTC Troubleshooting: P0230 (K20C1) - Honda Civic FC/FK 2016-2021

DTC Troubleshooting: P0230

DTC P0230: Fuel Pump Primary Circuit

NOTE:

	Before you troubleshoot, review the general troubleshooting information.
	If DTC P0560, P068A, and/or P068B are stored at the same time as DTC P0230, troubleshoot those DTCs first, then recheck for DTC P0230.

DTC Description	Confirmed DTC	Pending DTC
P0230 Fuel Pump Primary Circuit

Problem verification:

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
P0230 Fuel Pump Primary Circuit

Is DTC P0230 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 PGM-FI main relay 2 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.?

Relay check:

Relay check

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

?2.	Remove PGM-FI main relay 2.

?3.	Test PGM-FI main relay 2.

Is the relay OK?


	YES

Go to step 3.


	NO

Replace PGM-FI main relay 2.?

Determine possible failure area (FI MAIN RLY OUT line, others):

Determine possible failure area (FI MAIN RLY OUT line, others)

?1.	Turn the vehicle to the ON mode.

?2.

Measure the voltage between test points 1 and 2.

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

Is there battery voltage?


	YES

The FI MAIN RLY OUT wire is OK. Go to step 4.


	NO

Go to the troubleshooting for DTC P0560, P068A, and/or P068B.?

Open wire check (FUEL PUMP RLY CL- line):

Open wire check (FUEL PUMP 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 No. 2 (58P)

?4.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PGM-FI main relay 2: disconnected
	PCM connector No. 2 (58P): disconnected
Test point 1	PGM-FI main relay 2 4P socket (female terminals) No. 4:
Test point 2	PCM connector No. 2 (58P) No. 13

Is there continuity?


	YES

The FUEL PUMP RLY CL- wire is not open. Go to step 5.


	NO

Repair an open in the FUEL PUMP RLY CL- wire between PCM connector No. 2 terminal No. 13 and PGM-FI main relay 2.?

Shorted wire check (FUEL PUMP RLY CL- line):

Shorted wire check (FUEL PUMP RLY CL- line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PGM-FI main relay 2: disconnected
	PCM connector No. 2 (58P): disconnected
Test point 1	PGM-FI main relay 2 4P socket (female terminals) No. 4:
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the FUEL PUMP RLY CL- wire between PCM connector No. 2 terminal No. 13 and PGM-FI main relay 2.?


	NO

The FUEL PUMP RLY CL- wire is not shorted to ground. Go to step 6.

Shorted wire check (FUEL PUMP RLY CL- line to power):

Shorted wire check (FUEL PUMP RLY CL- line to power)

?1.	Turn the vehicle to the ON mode.

?2.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	PGM-FI main relay 2: disconnected
	PCM connector No. 2 (58P): disconnected
Test point 1	PGM-FI main relay 2 4P socket (female terminals) No. 4:
Test point 2	Body ground

Is there battery voltage?


	YES

Repair a short to power in the FUEL PUMP RLY CL- wire between PCM connector No. 2 terminal No. 13 and PGM-FI main relay 2.?


	NO

The FUEL PUMP 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, then recheck. If DTC P0230 goes away and the PCM was substituted, replace the original PCM.?