Dtc P0088 - Mazda Mazda6 Workshop Manual Supplement

DTC P0088

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