DTC P0191:00 [SKYACTIV-D 1.5]

id0102q2147600

DTC P0191:00

Fuel pressure sensor circuit range/performance problem
DETECTION CONDITION
•  The difference between the maximum and minimum value of the fuel pressure sensor output voltage in less than 0.0025 V or the difference between the actual fuel pressure and target fuel pressure relative to the feedback exceeds 5 MPa {51 kgf/cm2, 725 psi} for a continuous 1 s when the following conditions are met.
MONITORING CONDITIONS
―  Engine speed: 50—5,200 rpm
―  Fuel temperature: 90 °C {194 °F} or less
―  Target fuel pressure: more than 20 MPa {204 kgf/cm2, 2,901 psi}
―  Target fuel injection amount: exceeds 5 mm3
―  Target fuel discharge amount from supply pump: less than 1,000 mm3/rev
―  The following DTCs are not detected:
•  Fuel pressure sensor: P0192:00, P0193:00
•  Fuel temperature sensor: P0182:00, P0183:00
•  Suction control valve: P062A:00
•  Fuel leakage detected: P0093:00
Diagnostic support note
•  This is a continuous monitor (CCM).
•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA/Snapshot data is available.
•  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION
•  Inhibits the auto DPF regeneration control.
•  Inhibits the compulsory DPF regeneration control.
•  Inhibits the EGR control.
•  PCM restricts engine-transaxle integration control. (ATX)
•  Inhibits engine-stop by operating the i-stop function.
POSSIBLE CAUSE
•  Fuel pressure sensor connector or terminals malfunction
•  PCM connector or terminals malfunction
•  Fuel pressure sensor malfunction
•  PCM malfunction
SYSTEM WIRING DIAGRAM
Not applicable

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
Note
•  Recording can be facilitated using the screen capture function of the PC.
•  Record the FREEZE FRAME DATA/snapshot data on the repair order.
—
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
INSPECT FUEL PRESSURE SENSOR CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the fuel pressure sensor connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 6.
No
Go to the next step.
4
INSPECT PCM CONNECTOR CONDITION
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 6.
No
Go to the next step.
5
INSPECT FUEL PRESSURE SENSOR
•  Reconnect all disconnected connectors.
•  Inspect the fuel pressure sensor.
•  Is there any malfunction?
Yes
Replace the common rail, then go to the next step.
(See COMMON RAIL REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
No
Go to the next step.
6
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Drive the vehicle on a flat road surface 5 times under the following conditions.
1.  Idle the engine for 20 s.
2.  Shift to 2nd gear and rapidly accelerate the vehicle to 35 km/h {22 mph}and drive the vehicle at a constant speed for 25 s.
3.  Stop the vehicle.
4.  Switch the ignition to off and wait for 20 s or more.
5.  Shift to 3rd gear and rapidly accelerate the vehicle to 50 km/h {32 mph}and drive the vehicle at a constant speed for 50 s.
6.  Idle the engine for 20 s.
•  Perform the DTC Reading Procedure.
•  Is the same 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.
7
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [SKYACTIV-D 1.5].)
No
DTC troubleshooting completed.