DTC P0237:00 [PCM (SKYACTIV-G 2.5T)]

id0102s8023700

DTC P0237:00

Boost pressure sensor circuit low input
DETECTION CONDITION
•  The PCM monitors the input voltage from the boost pressure sensor. If the input voltage at the PCM terminal 2AS is below 0.28 V for 5 s, the PCM determines that the boost pressure sensor circuit has a malfunction.
Diagnostic support note
•  This is a continuous monitor (CCM).
•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA/Snapshot data is available.
•  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION
•  Stop the supercharging pressure control. (Fully open the wastegate valve)
POSSIBLE CAUSE
•  Boost pressure sensor/boost air temperature sensor connector or terminals malfunction
•  PCM connector or terminals malfunction
•  Short to ground in wiring harness between the following terminals:
?  Boost pressure sensor/boost air temperature sensor terminal C—PCM terminal 2AE
?  Boost pressure sensor/boost air temperature sensor terminal D—PCM terminal 2AS
•  Boost pressure sensor signal circuit and ground circuit are shorted to each other
•  Boost pressure sensor malfunction
•  PCM malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
Note
•  Recording can be facilitated using the screen capture function of the PC.
•  Record the FREEZE FRAME DATA/snapshot data on the repair order.
—
Go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT BOOST PRESSURE SENSOR/BOOST AIR TEMPERATURE SENSOR CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the boost pressure sensor/boost air temperature sensor connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 8.
No
Go to the next step.
4
INSPECT PCM CONNECTOR CONDITION
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 8.
No
Go to the next step.
5
INSPECT BOOST PRESSURE SENSOR CIRCUIT FOR SHORT TO GROUND
•  Verify that the boost pressure sensor/boost air temperature sensor and PCM connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
?  Boost pressure sensor/boost air temperature sensor terminal C
?  Boost pressure sensor/boost air temperature sensor terminal D
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Boost pressure sensor/boost air temperature sensor terminal C—PCM terminal 2AE
•  Boost pressure sensor/boost air temperature sensor terminal D—PCM terminal 2AS
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to Step 8.
No
Go to the next step.
6
INSPECT BOOST PRESSURE SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT TO EACH OTHER
•  Verify that the boost pressure sensor/boost air temperature sensor and PCM connectors are disconnected.
•  Inspect for continuity between boost pressure sensor/boost air temperature sensor terminals D and A (wiring harness-side).
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Boost pressure sensor/boost air temperature sensor terminal D—PCM terminal 2AS
•  Boost pressure sensor/boost air temperature sensor terminal A—PCM terminal 2J
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to each other.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to each other.
Go to Step 8.
No
Go to the next step.
7
INSPECT BOOST PRESSURE SENSOR
•  Reconnect all disconnected connectors.
•  Inspect the boost pressure sensor.
•  Is there any malfunction?
Yes
Replace the boost pressure sensor/boost air temperature sensor, then go to the next step.
(See BOOST PRESSURE SENSOR/BOOST AIR TEMPERATURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
No
Go to the next step.
8
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the KOEO or KOER self test.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
No
DTC troubleshooting completed.