DTC P0191:00 [MZR-CD 2.2]

id0102f3147600

DTC P0191:00

Fuel pressure sensor range/performance malfunction
DETECTION CONDITION
•  The PCM monitors the fuel pressure in the common rail and input signal from the fuel pressure sensor while the engine is running. If all of the following conditions is met, the PCM determines that there is malfunction in the fuel pressure sensor range/performance malfunction.
―  The PCM calculates the difference between the actual fuel pressure and the target fuel pressure. If the pressure difference is more than 5 MPa {51 kgf/cm2, 725 psi}.
―  The PCM monitors the input signal from the fuel pressure sensor. If the difference between the maximum and minimum voltage of the fuel pressure sensor is less than 0.01 V.
Monitoring conditions
―  Following conditions are met:
•  Engine speed: 50—5,200 rpm
•  Fuel temperature: less than 90 °C {194 °F}
•  Target fuel pressure: more than 20 MPa {204 kgf/cm2, 2,901 psi}
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 (mode2) and snapshot data are available.
•  DTCs are stored in the PCM memory.
POSSIBLE CAUSE
•  Fuel pressure sensor malfunction
•  Suction control valve malfunction
•  Clogged fuel line
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA (MODE2) OR SNAPSHOT DATA HAVE BEEN RECORDED
•  Have FREEZE FRAME DATA (mode2) or snapshot data been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (mode2) and snapshot data on the repair order, then go to the next step.
2
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.
3
VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT?
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Perform the Pending Trouble Code Access Procedure.
•  Is the PENDING CODE for this DTC present?
Yes
Go to the next step.
No
Intermittent concern exists.
Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”.
(See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD 2.2].)
4
INSPECT FUEL PRESSURE SENSOR
•  Inspect the fuel pressure sensor.
•  Is there any malfunction?
Yes
Replace the common rail, go to Step 7.
(See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step.
5
INSPECT SUCTION CONTROL VALVE
•  Inspect the suction control valve.
•  Is there any malfunction?
Yes
Replace the supply pump, go to Step 7.
(See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step.
6
INSPECT FUEL LINE
•  Switch the ignition to off.
•  Inspect for clogging in the following fuel lines for each cylinder:
―  Common rail and fuel injector.
―  Common rail and fuel tank.
•   Is there any malfunction?
Yes
Repair or replace the suspected fuel line, go to the next step.
No
Go to the next step.
7
VERIFY TROUBLESHOOTING OF DTC P0191:00 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Perform the Pending Trouble Code Access Procedure.
•  Is the PENDING CODE for this DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
8
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.