DTC P0234:00 [MZR-CD 2.2]

id0102f3148400

DTC P0234:00

Turbocharger overboost condition
DETECTION CONDITION
•  The PCM monitors the intake boost pressure using the boost sensor. If the difference between target intake boost pressure and actual intake boost pressure is above 30 kPa {0.31 kgf/cm2, 4.40 psi}, the PCM determines that the VBC system is over boost condition.
Diagnostic support note
•  The MIL does not illuminate.
•  FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.
•  The DTC is not stored in the PCM memory.
POSSIBLE CAUSE
•  Guide blade actuator position sensor malfunction
•  VBC solenoid valve malfunction
•  Guide blade actuator malfunction
•  Boost sensor malfunction
•  Turbocharger malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
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.
2
INSPECT GUIDE BLADE ACTUATOR POSITION SENSOR
•  Inspect the guide blade actuator position sensor.
•  Is there any malfunction?
Yes
Go to the next step.
No
Go to Step 4.
3
INSPECT VBC SOLENOID VALVE FOR STUCK OPEN
•  Inspect the VBC solenoid valve.
•  Is there any malfunction?
Yes
Replace the VBC solenoid valve, then go to Step 6.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
There is a malfunction in either guide blade actuator or guide blade actuator position sensor.
•  Replace the turbocharger, then go to Step 6.
4
INSPECT BOOST SENSOR
•  Inspect the boost sensor.
•  Is there any malfunction?
Yes
Replace the boost sensor, then go to Step 6.
(See COMMON RAIL REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step.
5
INSPECT TURBOCHARGER
•  Inspect the turbocharger.
•  Is there any malfunction?
Yes
Replace the turbocharger, then go to the next step.
(See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step.
6
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the “OBD DRIVE MODE”.
•  Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step.
7
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR-CD 2.2].)
No
DTC troubleshooting completed.