Mazda Mazda6 - Dtc P0088

ON-BOARD DIAGNOSTIC
F2–89
F2
DTC P0088
A6E407001082202
Diagnostic procedure
End Of Sie
DTC P0088 Fuel pressure system too high
DETECTION
CONDITION
• PCM monitors fuel pressure in common rail from fuel pressure sensor while engine running. If fuel pressure
is higher than preprogrammed criteria, PCM determines fuel pressure system too high.
POSSIBLE
CAUSE
• Suction control valve malfunction
• Fuel pressure sensor malfunction
• Fuel pressure limiter malfunction
• PCM malfunction
STEP INSPECTION ACTION
1 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Information
availability.
• Is any related repair information available?
Yes Perform repair or diagnosis according to available Service
Information.
• If vehicle is not repaired, go to next step.
No Go to next step.
2 FOLLOW OTHER DETECTED DTC FIRST
• Turn engine switch to OFF.
• Start engine.
• Have P0091, P0092, P0191, P0192, P0193
been detected?
Yes Go to applicable DTC inspection.
(See F2–87 DTC TABLE)
No Go to next step.
3 INSPECT SUCTION CONTROL VALVE
• Inspect suction control valve.
(See F2–54 SUCTION CONTROL VALVE
INSPECTION)
• Is there any malfunction?
Yes Repair supply pump, go to Step 6.
(See F2–54 SUPPLY PUMP INSPECTION)
No Go to next step.
4 INSPECT FUEL PRESSURE SENSOR
• Inspect fuel pressure sensor.
(See F2–79 FUEL PRESSURE SENSOR
INSPECTION)
• Is there any malfunction?
Yes Replace common rail, go to Step 6.
(See F2–53 SUPPLY PUMP REMOVAL/INSTALLATION)
No Go to next step.
5 INSPECT COMMON RAIL
• Inspect common rail.
(See F2–54 COMMON RAIL INSPECTION)
• Is there any malfunction?
Yes Replace common rail, go to next step.
(See F2–53 SUPPLY PUMP REMOVAL/INSTALLATION)
No Go to next step.
6 VERIFY TROUBLESHOOTING OF DTC P0088
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using WDS or
equivalent.
• Start engine.
• Is same DTC present?
Yes Replace PCM, go to next step.
(See F2–64 PCM REMOVAL/INSTALLATION)
No Go to next step.
7 VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure”.
(See F2–86 AFTER REPAIR PROCEDURE)
• Is there any DTC present?
Yes Go to applicable DTC inspection.
(See F2–87 DTC TABLE)
No Troubleshooting completed.