P0087
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE.
Increased idle.
Loss of performance.
Black smoke from the exhaust pipe
Hesitation on acceleration
Fuel Pressure Failure. Detected During Driving
Fault symptom
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Black smoke from the exhaust pipe
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Hesitation on acceleration
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On-Board Diagnostics
Type of diagnosis:
Enable criteria:
General conditions.
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Fuel temperature lower than 140°C.
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Requested fuel pressure higher than 20 MPa.
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The following DTCs should not be detected: P0191, P0192, P0193, P0253, P0254, P0258, P0259, P1636, P1637
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Diagnostics are performed when the following conditions are met for a duration of 0.2s.
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Engine speed higher than 700 rpm.
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Mean calculated rpm value (per 5 readings) must not exceed 50 rpm in variation.
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System voltage between 10.2 - 15.8 V.
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Fuel temperature over -10°C.
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Coolant temperature over -10°C
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Outdoor air temperature over -10°C
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Fuel quantity in the tank more than 5 L
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Fuel injection quantity must exceed 3 mm³/C.
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Mean calculated fuel injection quantity (per 5 combustions) must not exceed 5 mm³/C in variation.
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Fault criteria:
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When the difference between the requested and actual fuel pressure exceeds 20 MPa.
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Dependents:
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P0182, P0183, P026, P0200, P126, P1272, P0262, P0216, P1263, P1273, P0264, P1200, P1264, P1275, P0265, P1266, P1276, P0267, P1267, P1278, P0268, P1269, P0270, P1270, P0271, P0273, P0274, P0276, P0277.
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System reaction to a fault:
The following limitations apply:
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Pedal position sensor adjustable to max 30%, fuel quantity max 20 mm3/combustion, fuel pressure max 40 MPa.
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Idling speed increased to 1000 rpm (850 rpm when brake pedal is applied) and EGR control switched off.
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OK report:
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Fault criteria not fulfilled
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Fault handling:
(See section
Fault handling III, other emissions-related components and functions
for more information)
Diagnostic help
Functions in the diagnostic tool related to the fault:
Read value: Fuel pressure, Requested fuel pressure.
Fault diagnosis concerns the fuel system from the pump (fuel quantity valves) via the fuel rail to the nozzles, including the fuel filter.
Malfunctions in the fuel quantity valves can generate the DTC. Other causes may be a clogged fuel line or air in the line due to leakage. In certain cases, inadequate fuel quality or the fuel filter can cause clogging.
See also description of read value under
"Read Values" menu
for more information.
Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Check switches, connectors and crimp connections for oxidation, withdrawn pins and pin clamping force.
