DTC P0238 (1.5 L Engine)

DTC P0238  : Turbocharger Boost Sensor Circuit High Voltage

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

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Check the parameter (s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   TC BOOST PRESSURE SENSOR	More than 4.49	V

   Do the current condition (s) match the threshold?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the turbocharger boost sensor 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. Determine possible failure area (turbocharger boost sensor, others)

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

   -2. Disconnect the following connector.

   Turbocharger boost sensor 3P connector

   -3. Connect terminals A and B with a jumper wire.

   Terminal A	Turbocharger boost sensor 3P connector (female terminals) No. 1:
   Terminal B	Turbocharger boost sensor 3P connector (female terminals) No. 2:

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

   -4. Turn the vehicle to the ON mode.

   -5. Check the parameter (s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   TC BOOST PRESSURE SENSOR	More than 4.49	V

   Do the current condition (s) match the threshold?

   YES 

   Go to step 3.

   NO 

   Replace the turbocharger boost sensor .

3. Determine possible failure area (SG2 line, others)

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

   -2. Remove the jumper wire from the turbocharger boost sensor 3P connector.

   -3. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode
   	Turbocharger boost sensor 3P connector: disconnected
   Test point 1	Turbocharger boost sensor 3P connector (female terminals) No. 1:
   Test point 2	Turbocharger boost sensor 3P connector (female terminals) No. 3:

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

   Is there about 5.0 V?

   YES 

   Go to step 5.

   NO 

   Go to step 4.

4. Open wire check (SG2 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 E (80P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Turbocharger boost sensor 3P connector: disconnected
   	PCM connector E (80P): disconnected
   Test point 1	Turbocharger boost sensor 3P connector (female terminals) No. 1:
   Test point 2	PCM connector E (80P) No. 78

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

   Is there continuity?

   YES 

   The SG2 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 SG2 wire between the PCM (E78) and the turbocharger boost sensor.

5. Open wire check (P3 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 E (80P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Turbocharger boost sensor 3P connector: disconnected
   	PCM connector E (80P): disconnected
   Test point 1	Turbocharger boost sensor 3P connector (female terminals) No. 2:
   Test point 2	PCM connector E (80P) No. 57

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

   Is there continuity?

   YES 

   The P3 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 P3 wire between the PCM (E57) and the turbocharger boost sensor.