DTC Troubleshooting: P0223 (L4) - Honda Accord CR/CT 2012-2017

DTC Troubleshooting: P0223

DTC P0223: TP Sensor B Circuit High Voltage

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0223 TP Sensor B Circuit High Voltage

Problem verification:

Problem verification

?1.	Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.	Clear the DTC with the HDS.

?3.

Check TP SENSOR B in the DATA LIST with the HDS.

Signal	Threshold		Current conditions
Signal	Values	Unit	Values	Unit
TP SENSOR B	More than 4.8	V

Do the current condition(s) match the threshold?


	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 throttle body and the PCM.?

Determine possible failure area (SG3 (DBW) line, others):

Determine possible failure area (SG3 (DBW) line, others)

?1.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0123 TP Sensor A Circuit High Voltage
P0223 TP Sensor B Circuit High Voltage

Are DTC P0123 and P0223 indicated at the same time?


	YES

Go to step 5.


	NO

Go to step 3.

Determine possible failure area (throttle body, others):

Determine possible failure area (throttle body, others)

?1.	Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.

Disconnect the following connector.

Throttle body 6P connector

?3.	Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?4.

Measure the voltage between test points 1 and 2.

Test condition	IG ON (II) or ON mode
	Throttle body 6P connector: disconnected
Test circuit	THL2
Test point 1	Throttle body 6P connector No. 4 (RED/BLU)
Test point 2	Body ground

Is there about 5.0 V?


	YES

Replace the throttle body, then do the repair verification.


	NO

Go to step 4.

Open wire check (THL2 line):

Open wire check (THL2 line)

?1.	Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.	Jump the SCS line with the HDS.

?3.

Disconnect the following connector.

PCM connector B (51P)

?4.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode
	Throttle body 6P connector: disconnected
	PCM connector B (51P): disconnected
Test circuit	THL2
Test point 1	Throttle body 6P connector No. 4 (RED/BLU)
Test point 2	PCM connector B (51P) No. 47 (RED/BLU)

Is there continuity?


	YES

The THL2 wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then do the repair verification.


	NO

Repair an open in the THL2 wire between the PCM (B47) and the throttle body, then do the repair verification.

Open wire check (SG3 (DBW) line):

Open wire check (SG3 (DBW) line)

?1.	Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.	Jump the SCS line with the HDS.

?3.

Disconnect the following connectors.

PCM connector B (51P)

Throttle body 6P connector

?4.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode
	PCM connector B (51P): disconnected
	Throttle body 6P connector: disconnected
Test circuit	SG3 (DBW)
Test point 1	Throttle body 6P connector No. 3 (GRN)
Test point 2	PCM connector B (51P) No. 49 (GRN)

Is there continuity?


	YES

The SG3 (DBW) wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then do the repair verification.


	NO

Repair an open in the SG3 (DBW) wire between the PCM (B49) and the throttle body, then do the repair verification.

Repair verification:

?1.	Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.	Reconnect all connectors.

?3.	Exit the SCS mode with the HDS.

?4.	Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?5.	Reset the PCM with the HDS.

?6.	Do the PCM idle learn procedure.

?7.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0223 TP Sensor B Circuit High Voltage

Is DTC P0223 indicated?


	YES

Check for poor connections or loose terminals at the throttle body and the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to step 1.


	NO

Troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.?