P228D
DTC P0089, P00C6, P228C, or P228D
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P0089
- Fuel Pressure Regulator Performance
DTC P00C6
- Fuel Rail Pressure Low During Engine Cranking
DTC P228C
- Fuel Pressure Regulator Control Performance - Low Pressure
DTC P228D
- Fuel Pressure Regulator Control Performance - High Pressure
Circuit/System Description
The fuel rail pressure sensor detects fuel pressure within the fuel rail. The engine control module (ECM) provides a 5 V reference voltage on the 5 V reference circuit and ground on the low reference circuit. The ECM receives a varying signal voltage on the signal circuit.
High pressure fuel is regulated by the high pressure fuel pump actuator, which is a part of the high pressure fuel pump. The high pressure fuel pump actuator is a solenoid valve. The ECM provides a voltage on the actuator high control circuit and ground on the actuator low control circuit. Both circuits are controlled through output drivers within the ECM. When deactivated, both drivers are disabled. When activated, the high control circuit driver energizes the high pressure fuel pump actuator and the low control circuit driver pulse-width modulates (PWM) the low control circuit to ground.
The high pressure mechanical fuel pump is driven by three lobes on the camshaft. The ECM uses the camshaft and crankshaft position sensor inputs to synchronize the high pressure fuel pump actuator with the position of each of the camshaft lobes. The ECM regulates fuel pressure by adjusting the portion of each pump stroke that provides fuel to the rail.
The ECM monitors the fuel rail fuel pressure sensor and the high pressure fuel pump actuator to determine if the commanded and actual pressure are within a predetermined range, or if the amount of fuel pressure correction exceeds a calibrated pressure.
Conditions for Running the DTC
P0089, P228C, or P228D
* DTC P0016, P0017, P0090, P0091, P0092, P00C8, P00C9, P00CA, P0111, P0112, P0113, P0114, P0116, P0117, P0118, P0119, P0128, P0191, P0192, P0193, P0335, P0336, P0340, P0341, P0365, P0366, P0628, or P1682 is not set.
* The ignition voltage is greater than 11 V.
* The engine is running.
* The low side fuel pressure is greater than 250 kPa (36 psi).
* The barometric (BARO) pressure is greater than 70 kPa.
* The intake air temperature (IAT) is warmer than -20°C (-4°F).
* The DTC runs continuously when the above conditions are met for 60 s.
P00C6
* DTC P0016, P0017, P0090, P0091, P0092, P00C8, P00C9, P00CA, P0111, P0112, P0113, P0114, P0116, P0117, P0118, P0119, P0128, P0191, P0192, P0193, P0335, P0336, P0340, P0341, P0365, P0366, P0628, or P1682 is not set.
* The ignition voltage is greater than 8 V.
* The engine coolant temperature is between -100 and +80°C (-148 and +176°F).
* The low side fuel pressure is greater than 0 kPa (0 psi).
* The engine is not running.
* The DTC runs once for each engine start.
Conditions for Setting the DTC
P0089
The high pressure fuel pump actuator command is greater than or equal to 100 ° or less than or equal to 0 °. The condition exists for greater than 5 s.
P00C6
The ECM detects that the fuel pressure is not rising or has fallen beyond acceptable limits during engine cranking.
P228C
The actual fuel rail pressure is 3 MPa (435 psi) less than the desired fuel pressure. The condition exists for greater than 5 s.
P228D
The actual fuel rail pressure is 3 MPa (435 psi) greater than the desired fuel rail pressure. The condition exists for greater than 5 s.
Action Taken When the DTC Sets
* DTCs P0089 and P00C6 are Type B DTCs.
* DTCs P228C and P228D are Type A DTCs.
* A message center or an indicator displays Reduced Engine Power.
* Scan tool control of the high pressure fuel pump is inhibited.
Conditions for Clearing the DTC
* DTCs P0089 and P00C6 are Type B DTCs.
* DTCs P228C and P228D are Type A DTCs.
Diagnostic Aids
* A restricted fuel feed pipe between the fuel feed pipe fuel pressure sensor and the high pressure fuel pump may set a DTC.
* A condition with the fuel tank fuel pump module or the fuel pump power control module may set a DTC.
* A skewed fuel rail pressure sensor, or an intermittent condition in the fuel rail pressure sensor circuits may set a DTC.
* A leaking or restricted fuel injector may set a DTC.
* A short to voltage in the crankshaft position signal circuit may set a DTC.
* A short to voltage in the camshaft position actuator solenoid valve control circuit may set a DTC.
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Sunshade - Left
Description and Operation
Fuel System Description Fuel System Description
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify DTC P0628, P069E, or U0109 is not set.
• If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
• If none of the DTCs are set
3. Attempt to start and idle the engine.
4. Verify DTC P0089, P00C6, P228C, or P228D is not set.
• If any of the DTCs are set
Refer to Circuit/System Testing.
• If none of the DTCs are set
5. Engine idling.
6. Verify the scan tool Fuel Rail Pressure Sensor parameter is approximately 2.96-3.24 MPa (429-470 psi).
• If not between 2.96-3.24 MPa (429-470 psi)
Refer to Circuit/System Testing.
• If between 2.96-3.24 MPa (429-470 psi)
7. Command an increase and decrease in Fuel Rail Pressure with a scan tool. Verify the scan tool Fuel Rail Pressure Sensor parameter increases or decreases with each commanded state.
• Does not change
Refer to Circuit/System Testing.
• Changes
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 Testing
Note: Circuit/System Verification must be performed first or misdiagnosis may result.
1. Ignition ON.
2. Command an increase in Fuel Pressure with a scan tool. Verify the scan tool Fuel Pressure Sensor parameter increases to greater than 414 kPa (60 psi) as commanded.
• Does not increase
Refer to Fuel System Diagnosis Fuel System Diagnosis for further diagnosis.
• Increases
3. Remove the G18 high pressure fuel pump.
4. Inspect the lobes on the camshaft for unusual wear.
• Lobes are worn
Replace the camshaft.
• Lobes are normal
Replace the G18 high pressure fuel pump.
Component Testing
Static Test
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 0.46-0.51 ohms between the high control circuit terminal 1 and the low control circuit terminal 2.
• If not between 0.46-0.51 ohms
Replace the G18 high pressure fuel pump.
• If between 0.46-0.51 ohms
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
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Camshaft Position Actuator and Camshaft Replacement - Intake Camshaft Position Actuator and Camshaft Replacement - Intake
* Fuel Injection Fuel Rail Fuel Pressure Sensor Replacement Fuel Injection Fuel Rail Fuel Pressure Sensor Replacement
* Fuel Pump Replacement Fuel Pump Replacement