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With my scanner, I found able to find voltage anomaly. Rail 1 and Rail 2 voltage does not match.
Any know what voltage should be?
Also, I also found out that there is only 1 Fuel Rail Pressure Sensor (driveside).
Where is the 2nd sensor ?
At this point, I dont even know what voltage is for what sensor.
First off what year is the car ??...helps us if you can enter all info about your car in your profile....usually a good scan tool will show you a voltage and pressure data PID...the pressure one normally shows desired and actual...desired is the expected pressure and actual is what the scan tool is seeing from the ECM...your sensor has 2 signal circuits 1 and 2 and is a 4 wire sensor..the ECM provides a 5 volt reference and the 5 volts is pulled to ground and sent out on the signal wire depending on the fuel pressure...below is from Service Information...may be a bad sensor or faulty high pressure fuel pump....unfortunately we can't diagnose it for you...if it is a sensor circuit issue a DVOM will be needed...this is a "performance" trouble code and not a "circuit" trouble code which tells me it's possibly a pump issue but wiring should still be checked...I checked your previous posts and you had a P0306 misfire...was that ever resolved ???...it says a restricted injector can cause a P228C…if you have no diagnostic or electrical knowledge I highly recommend you seek out a diagnostic shop and not a dealership or general repair shop…they only change parts !!
P228C
* The fuel rail pressure is greater than 3.00 MPa (435 psi) below the desired fuel rail pressure.
* The above condition exists for 750 out of 938 counts, approximately 30 seconds at idle or 7 seconds at 2,700 RPM.
Diagnostic Aids
* A leak in the high pressure fuel system may set a DTC.
* 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 high pressure fuel pump and the fuel rail pressure sensor may set a DTC.
* 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 leaking or restricted fuel injector may set the DTC.
* As little as 2 ohms on either circuit of the high pressure fuel pump solenoid will cause a DTC to set. Test the circuits of the high pressure fuel pump solenoid for a high resistance if you suspect a condition.
I looked at your previous post and saw you have a 2014…the info I posted was from 2014 Service Information…I will post all the info for that DTC below.
DTC P228D - Fuel Pressure Regulator Control Performance - High Pressure
Circuit/System Description
The high fuel pressure necessary for direct injection is supplied by the high pressure fuel pump. The high pressure fuel pump is mounted on the rear of the engine under the intake manifold and is driven by a three-lobe cam on the camshaft. This high pressure fuel pump also regulates the fuel pressure using an actuator in the form of an internal solenoid-controlled valve. In order to keep the engine running efficiently under all operating conditions, the engine control module (ECM) requests pressure ranging from 2 to 15 MPa (290 to 2,176 psi), depending on engine speed and load. Output drivers in the ECM provide the high pressure fuel pump control circuit with a 12 V pulse-width modulated (PWM) signal, which regulates fuel pressure by opening and closing the control valve at specific times during pump strokes. This effectively regulates the portion of each pump stroke that is delivered to the fuel rail. The high pressure fuel pump is normally closed and will not deliver an increase in fuel pressure when the control solenoid is NOT powered. In the event of pump control failure, the high pressure system is protected by a relief valve in the pump that prevents the pressure from exceeding 21.5 MPa (3,118 psi).
The fuel rail pressure sensor is a dual analog sensor that provides the feedback necessary to the ECM to control the high pressure fuel pump and the fuel injectors. The sensor is diagnosed separately from the fuel pressure control system.
The ECM monitors the fuel rail pressure sensor and the high pressure fuel pump solenoid to determine if the commanded and actual pressures are within a predetermined range during engine cranking and at all times while the engine is running. The ECM also monitors the high pressure fuel pump solenoid to make sure it is operating within expected limits.
* Fuel rail pressure is greater than 0.275 MPa (40 psi).
* Battery voltage is greater than 11 V.
* Fuel temperature is between -10°C (14°F) and 100°C (212°F).
* Intake air temperature is greater than -10°C (14°F).
* The engine has been running for greater than 2 m.
* Barometer pressure is greater than 70 kPa.
* Vehicle is not in a low fuel state.
* The DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
P0089
* The high pressure fuel pump has exceeded the control limits. This condition exists when the high pressure fuel pump actuator command is 0° or greater than 130°.
* The above condition exists for 750 out of 938 counts, approximately 30 seconds at idle or 7 seconds at 2,700 RPM.
P228C
* The fuel rail pressure is greater than 3.00 MPa (435 psi) below the desired fuel rail pressure.
* The above condition exists for 750 out of 938 counts, approximately 30 seconds at idle or 7 seconds at 2,700 RPM.
P228D
* The fuel rail pressure is greater than 3.00 MPa (435 psi) above the desired fuel rail pressure.
* The above condition exists for 750 out of 938 counts, approximately 30 seconds at idle or 7 seconds at 2,700 RPM.
Action Taken When the DTC Sets
DTC P0089 is a Type B DTC.
DTCs P228C and P228D are Type A DTCs.
Conditions for Clearing the DTC
DTC P0089 is a Type B DTC.
DTCs P228C and P228D are Type A DTCs.
Diagnostic Aids
* A leak in the high pressure fuel system may set a DTC.
* 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 high pressure fuel pump and the fuel rail pressure sensor may set a DTC.
* 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 leaking or restricted fuel injector may set the DTC.
* As little as 2 ohms on either circuit of the high pressure fuel pump solenoid will cause a DTC to set. Test the circuits of the high pressure fuel pump solenoid for a high resistance if you suspect a condition.
4. Verify the Fuel Rail Pressure Sensor parameter is between 1.9-6.0 MPa (276-870 psi).
♦ If not between 1.9-6.0 MPa (276-870 psi) Refer to Circuit/System Testing.
♦ If between 1.9-6.0 MPa (276-870 psi)
5. Verify the scan tool Fuel Rail Pressure parameter increases or decreases while commanding an increase and decrease in Fuel Rail Pressure with a scan tool.
♦ If the pressure does not increase or decrease with each command Refer to Circuit/System Testing.
♦ If the pressure increases or decreases with each command
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. Verify the scan tool Fuel Pressure Sensor parameter does not drop off during acceleration, cruise or hard cornering.
7. 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 5,600 RPM. Repeat the test at least three times.
8. Verify DTC P0089, P228C, or P228D is not set.
♦ If the DTC is set Refer to Circuit/System Testing.
♦ If the DTC is not set
9. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed in the Freeze Frame/Failure Records data.
10. Verify DTC P0089, P228C, or P228D is not set.
♦ If the DTC is set Refer to Circuit/System Testing.
♦ If the DTC is not set
11. All OK.
Circuit/System Testing
1. Ignition OFF, all vehicle systems OFF, disconnect the harness connector at the K20 Engine Control Module. It may take up to 2 min for all vehicle systems to power down.
2. Disconnect the harness connector at the G18 High Pressure Fuel Pump.
3. Test for less than 2 ohms between G18 High Pressure Fuel Pump connector terminal 2 and the K20 Engine Control Module high control circuit terminal 16.
♦ If greater than 2 ohms Repair the high resistance in the circuit.
♦ If 2 ohms or less
4. Test for less than 2 ohms between the G18 High Pressure Fuel Pump connector terminal 1 and the K20 Engine Control Module high control circuit terminal 32.
♦ If greater than 2 ohms Repair the high resistance in the circuit.
♦ If 2 ohms or less
5. Remove the G18 High Pressure Fuel Pump.
6. Verify the lobes on the camshaft does not have unusual wear or are worn.
♦ If the lobes have unusual wear or are worn Replace the Camshaft.
♦ If the lobes do not have unusual wear or are not worn
7. 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 ohms in order to prevent misdiagnosis.
2. Test for 0.34 - 0.44 ohms at 20°C (68°F) between the low control circuit terminal 1 and the high control circuit terminal 2.
♦ If not within the specified range Replace the G18 High Pressure Fuel Pump.
♦ If within the specified range
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.
Note: Some vehicles do not support the Fuel Rail Pressure Relief Valve Reset procedure. Applications not supporting this procedure will return an error message stating "Parameter ID not supported. Check for proper vehicle selection."
* Perform the Fuel Rail Pressure Relief Valve Reset procedure.
So checked my Fuel Pressure Sensor and I notice a nick on the wire harness.
I inspected the wires and it look fine, so I just sealed it up with electrical tap. I put everything back and started the car. The car started up instantly. I was so happy. The voltage of the sensor it went back to normal.
Then I turn off the car and started the car again. Now I have no pressure in both fuel rails. So I dived back in and notice the there is fuel in my intake manifold.
Do you think its something with the vacuum ? I used new gaskets.
P228c fault code
