DTC P0087 Without RPO CTF
Circuit Description
The common rail pressure sensor is installed at the left end of the common rail. The sensor is used to detect fuel pressure. The common rail pressure sensor is a semiconductor-type pressure sensor. The sensor utilizes silicon's property that the electric resistance of pressurized silicone is varied.
A special gasket is used at the connection part with the common rail body in order to seal high pressure fuel.
Conditions for Running
| • | The idle speed control (ISC) target speed, common rail pressure are not controlled. |
| • | DTCs P0091, P0092, P0192, P0193, P1291, or P1292 are not set. |
| • | The crankshaft position (CKP) sensor is in a normal condition. |
| • | The battery voltage is higher than 8 volts. |
| • | The pump speed is higher than 450 RPM. |
| • | The engine coolant temperature (ECT) is higher than 60°C (140°F) |
| • | The common rail pressure is higher than target the pressure plus 5 MPa (725 psi). |
Conditions for Setting the DTC
| • | The pressure control (PC) valve opening timing reaches the limit or feedback value -60 CA. |
| • | The common rail pressure is more than 5 MPa over the target pressure. |
| • | The above conditions are met 255 times. |
Action Taken When the DTC Sets
| • | The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails. |
| • | The ECM limits fuel delivery. |
Conditions for Clearing the MIL/DTC
| • | The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail. |
| • | A current DTC, Last Test Failed, clears when the diagnostic runs and passes. |
| • | A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic. |
| • | Clear the MIL and the DTC with a scan tool. |
Diagnostic Aids
Inspect for the following conditions:
| • | Poor connection at the ECM |
| Inspect the harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal-to-wire connection. |
| • | Lack of power due to fuel leakage, fuel pressure and injection amount limited. |
| • | Inspect the fuel filter for a leakage or restriction. |
| • | Inspect for leaking injection lines. |
Step | Action | Yes | No | ||||
|---|---|---|---|---|---|---|---|
Schematic Reference: Engine Controls Schematics | |||||||
1 |
Important: In case of pressure control (PC) sensor and/or PC valve abnormality, stop the diagnosis. If the PC sensor and PC valve malfunction simultaneously, repair them first. Does the DTC set while the ignition is ON and the engine is running? | Go to Step 2 | Go to Diagnostic Aids | ||||
2 | Inspect for the following conditions:
Is the fuel shortage flag set? | Go to Step 7 | Go to Step 3 | ||||
3 | Clear all DTCs. Does the DTC reset? | Go to Step 5 | Go to Step 4 | ||||
4 | Inspect the engine control module (ECM) connector, the ECM ground, and the PC sensor connector for poor connections. Did you find and correct the condition? | Go to Step 9 | Go to Step 10 | ||||
5 |
Important: Inspect for leaking injection lines. Inspect for a supply pump abnormality or pump sticking. Did you find a concern with the supply pump? | Go to Step 8 | Go to Step 6 | ||||
6 | Clear all DTCs. Does the DTC reset? | Go to Step 9 | System OK | ||||
7 | Replace the pressure limiter. Did you complete the replacement? | Go to Step 10 | -- | ||||
8 | Replace the supply pump. Did you complete the replacement? | Go to Step 10 | -- | ||||
9 | Replace the ECM. Did you complete the replacement? | Go to Step 10 | -- | ||||
10 | Clear all DTCs. Does the DTC reset? | Go to Step 1 | Go to Step 11 | ||||
11 | Do any other DTCs set? | System OK | |||||
DTC P0087 With RPO CTF
Circuit Description
The engine control module (ECM) monitors fuel rail pressure (FRP) using the FRP sensor. If the sensor indicates a pressure less than the commanded rail pressure, plus a possible transitional overshoot, the ECM will set DTC P0087 for fuel rail pressure too low.
Conditions for Running the DTC
| • | The battery voltage is between 10-16 volts. |
| • | The ignition is ON. |
| • | The engine speed is more than 500 RPM. |
| • | DTC P0091, P0092, P0192, P0193, P0201-P0206, P0335, P1087, P1088, P1263-P1266, P2011, or P2012 are not set. |
Conditions for Setting the DTC
The fuel injection volume does not follow the target fuel injection volume.
OR
The fuel rail pressure does not follow the target fuel rail pressure.
Action Taken When the DTC Sets
| • | The ECM illuminates the malfunction indicator lamp (MIL) and reduced engine power indicator lamp, if equipped, when the diagnostic runs and fails. |
| • | The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Failure Records. |
| • | The ECM limits the accelerator operating range. |
| • | The ECM limits the fuel injection quantity. |
| • | The ECM limits the fuel rail pressure. |
| • | The ECM closes the exhaust gas recirculation (EGR) valve and stops EGR control. |
| • | The ECM inhibits cruise control. |
| • | The ECM inhibits power take-off (PTO) control. |
Conditions for Clearing the DTC
| • | The MIL resets when the ignition is turned OFF. |
| • | A current DTC, Last Test Failed, clears when the diagnostic runs and passes. |
| • | Clear the MIL and the DTC with a scan tool. |
Diagnostic Aids
| • | An intermittently sticking suction control valve (SCV) may have allowed the fuel pressure to drop suddenly. |
| • | Normal actual fuel rail pressure readings on the scan with the engine running Park or Neutral at idle are 3 650-5 050 psi (25-35 MPa) and 8 700-18 850 psi (60-130 MPa) in Park or Neutral at WOT, accelerator pedal full travel. |
| • | An intermittently sticking fuel injector may have allowed the fuel pressure to drop too much. Use a scan tool to perform the Cylinder Power Balance Test for each injector. Verify a consistent engine speed change when commanding each fuel injector ON and OFF. |
| • | A skewed fuel rail pressure (FRP) sensor value, shifted to a higher pressure, can set this DTC. The actual fuel rail pressure on the scan tool should read 0 psi (0 MPa) with the key ON and the engine OFF after the engine has stopped running for a minimum of 2 minutes. |
| • | Resistance in the FRP sensor low reference circuit can set this DTC. Ensure that the sensor low reference circuit has no resistance and the connectors are tight and free of corrosion. |
| • | The fuel system from the fuel tank to the fuel supply pump is under a slight vacuum with the engine running. As a result, air can enter the fuel system if these connections are not tight or if there is a crack in one of the fuel hoses. Air in the fuel system will cause fuel rail pressure fluctuations especially at high engine speed and load, which may set this DTC. |
Step | Action | Values | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
Schematic Reference: Engine Controls Schematics | ||||||||
1 | Did you perform the Diagnostic System Check - Engine Controls? | -- | Go to Step 2 | |||||
2 |
Did the DTC fail this ignition? | -- | Go to Step 3 | Go to Intermittent Conditions | ||||
3 |
Did the DTC fail this ignition? | -- | Go to Step 4 | System OK | ||||
4 |
Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 5 | ||||
5 |
Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 6 | ||||
6 | Inspect the fuel pipe.
Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 7 | ||||
7 |
Is there a change in the engine noise? | -- | Go to Step 9 | Go to Step 8 | ||||
8 | Replace the fuel injector. Refer to Fuel Injector Replacement and Fuel Injector Flow Rate Programming . Did you complete the replacement? | -- | Go to Step 20 | -- | ||||
9 |
Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 10 | ||||
10 |
Is the parameter near the specified value? | 0 MPa | Go to Step 11 | Go to Step 13 | ||||
11 |
Is the parameter within the specified range? | 25-40 MPa (3,626-5,801 psi) | Go to Step 13 | Go to Step 12 | ||||
12 |
Was a condition found? | -- | Go to Step 13 | Go to Step 11 | ||||
13 | Inspect the fuel rail pressure sensor. Was a condition found? | -- | Go to Step 17 | Go to Step 14 | ||||
14 |
Was a condition found? | -- | Go to Step 15 | Go to Step 16 | ||||
15 |
Was a condition found? | -- | Go to Step 20 | Go to Step 16 | ||||
16 |
Was a condition found? | -- | Go to Step 18 | Go to Step 17 | ||||
17 | Replace the fuel rail system assembly. Did you complete the replacement? | -- | Go to Step 20 | -- | ||||
18 |
Did the DTC fail this ignition? | -- | Go to Step 19 | Go to Step 20 | ||||
19 |
Important: The new ECM must be programmed. Replace the ECM. Refer to Engine Control Module Replacement/Restore Fuel Rate Data . Did you complete the replacement? | -- | Go to Step 20 | -- | ||||
20 |
Did the DTC fail this ignition? | -- | Go to Step 2 | Go to Step 21 | ||||
21 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | -- | System OK | |||||
