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 DTC P0088 [MZR-CD (RF Turbo)]

DTC P0088 [MZR-CD (RF Turbo)]

id0102f1953700

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 197 MPa {2,009 kgf/cm2, 28,565 psi}, the PCM determines that the fuel pressure is too high.
Diagnostic support note
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• Suction control valve malfunction
• Supply pump malfunction
• Fuel pressure sensor malfunction
• Fuel pressure limiter malfunction
• Fuel pipe improper connection on fuel tank
• 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 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 FUEL PIPE CONNECTION ON FUEL TANK
• Inspect the fuel pipes for supply and return connection at fuel tank.
• Are fuel pipes connected properly?
Yes
Go to the next step.
No
Reconnect fuel pipes properly, then go to Step 10.
6
INSPECT FUEL LINE
• Turn the engine switch off.
• Inspect for fuel leakage or clogging in the following fuel lines for each cylinder:
- Supply pump and common rail.
- Common rail and fuel injector
• Is there any malfunction?
Yes
Repair or replace suspect fuel line, then go to Step 10.
No
Go to the next step.
7
INSPECT SUCTION CONTROL VALVE
• Inspect the suction control valve.
• Is there any malfunction?
Yes
Repair the supply pump, go to Step 10.
No
Go to the next step.
8
INSPECT FUEL PRESSURE SENSOR
• Inspect the fuel pressure sensor.
• Is there any malfunction?
Yes
Replace the common rail, go to Step 10.
No
Go to the next step.
9
INSPECT COMMON RAIL
• Inspect the common rail.
• Is there any malfunction?
Yes
Replace the common rail, go to the next step.
No
If DTC P0088 and P0093 are stored together, the possible cause could be a supply pump internal failure. Replace the supply pump, then go to the next step.
Go to the next step except for the above case.
10
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.
11
VERIFY AFTER REPAIR PROCEDURE
• Perform the Repair Verification Drive Mode.
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.