Here is information to digest:
P228D:
The actual fuel rail pressure is 3 MPa (435 psi) greater than the desired fuel rail pressure. The condition exists for greater than 10 s.
Diagnostic Aids:
Any problem with the camshaft may set fuel pressure DTCs due to the location and design of the high pressure fuel pump. If camshaft position control DTCs are current or in history, a cam control issue may be the root cause.
•A faulty valve, plunger, or solenoid in the high pressure fuel pump may set a DTC. High pressure fuel pump damage will most likely be undetectable upon visual inspection.
•A restricted fuel feed pipe between the fuel feed pipe fuel pressure sensor and the high pressure fuel pump may set a DTC.
•A leaking or restricted fuel injector may set a DTC.
•A leak in the high pressure fuel system may set a DTC.
•Vapor lock may set DTC P0089
Circuit/System Verification 1. Attempt to start and idle the engine.
2. Observe the DTC information with a scan tool. DTCs P0089, P00C6, P228C, and P228D should not set.
⇒ If any of the DTCs are set
Refer to Circuit/System Testing.
⇓ If none of the DTCs are set
3. Engine idling.
4. Verify the scan tool Fuel Rail Pressure Sensor parameter is approximately 1.9–5.0 MPa (276–725 PSI).
⇒ If not between 1.9–5.0 MPa (276–725 PSI)
Refer to Circuit/System Testing.
⇓ If between 1.9–5.0 MPa (276–725 PSI)
5. Verify the scan tool Fuel Rail Pressure Sensor parameter increases or decreases while commanding an increase and decrease in Fuel Rail Pressure with a scan tool.
⇒ Does not change
Refer to Circuit/System Testing.
⇓ Changes
Warning: Road test a vehicle under safe conditions and while obeying all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions could lead to serious personal injury and vehicle damage.
6. Road test the vehicle and perform a wide open acceleration from a stop until the transmission shifts into second gear. On manual transmission applications, shift to second gear or stop the test near 2,500 RPM. Repeat the test at least three times.
7. Verify DTCs P0089, P00C6, P228C, and P228D do not set.
⇒ If any of the DTCs set
Refer to Circuit/System Testing.
⇓ If none of the DTCs set
8. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
9. Verify the DTC does not set.
⇒ If the DTC sets
Refer to Circuit/System Testing.
⇓ If the DTC does not set
10. All OK.
Circuit/System TestingNote: Circuit/System Verification must be performed first or misdiagnosis may result.
1. Remove the G18 High Pressure Fuel Pump.
2. Verify the lobes on the camshaft do not have unusual wear or are worn.
⇒ If the lobes have unusual wear or are worn
Replace the Camshaft.
⇓ If the lobes are OK
3. Test or replace the G18 High Pressure Fuel Pump.
Component Testing 1. Ignition OFF, disconnect the harness connector at the G18 High Pressure Fuel Pump.
Note: The DMM and test leads must be calibrated to 0 Ω in order to prevent misdiagnosis.
2. Test for 9–11 Ω at 25°C (77°F) between the high control circuit terminal 2 and the low control circuit terminal 1.
⇒ If not between 9–11 Ω
Replace the G18 High Pressure Fuel Pump.
⇓ If between 9–11 Ω
3. Test for infinite resistance between each terminal and the G18 High Pressure Fuel Pump housing.
⇒ If less than infinite resistance
Replace the G18 High Pressure Fuel Pump.
⇓ If infinite resistance
4. All OK