DTC P0088 [MZR-CD (RF Turbo)]

BME010200102238

DTC P0088

Fuel pressure system too high

DETECTION CONDITION

• The PCM monitors the fuel pressure in the common rail from the fuel pressure sensor while the engine running. If the fuel pressure is more than 188 MPa {1,917 kgf/cm2, 27,267 psi}, the PCM determines that the fuel pressure is too high.

POSSIBLE CAUSE

• Suction control valve malfunction
• Fuel pressure sensor malfunction
• Fuel pressure limiter malfunction
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Verify related service information availability.
• Is any related repair 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
VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT?
• Connect the WDS or equivalent to the DLC-2.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists.
Perform the "INTERMITTENT CONCERN TROUBLESHOOTING".
4
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is P0627, P0628, P0629, P0191, P0192 or P0193 on FREEZE FRAME DATA?
Yes
Go to the applicable DTC inspection.
No
Go to the next step.
5
INSPECT SUCTION CONTROL VALVE
• Inspect the suction control valve.
• Is there any malfunction?
Yes
Repair the supply pump, go to Step 8.
No
Go to the next step.
6
INSPECT FUEL PRESSURE SENSOR
• Inspect the fuel pressure sensor.
• Is there any malfunction?
Yes
Replace the common rail, go to Step 8.
No
Go to the next step.
7
INSPECT COMMON RAIL
• Inspect the common rail.
• Is there any malfunction?
Yes
Replace the common rail, go to the next step.
No
Go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC P0088 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
Yes
Replace the PCM, go to the next step.
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform the Repair Verification Drive Mode.
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.