DTC P0089, P00C6, P228C, P228D, or P2C1E-P2C20

Engine Controls and Fuel - 5.3L L84 or 6.2L L87 | Diagnostic Information and Procedures | Document ID: 5180489 Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor 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 DTC P2C1E Cold Start Fuel Pressure Regulator Performance DTC P2C1F Cold Start Fuel Pressure Regulator Performance - Low Pressure DTC P2C20 Cold Start Fuel Pressure Regulator Performance - High Pressure Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performanc
Control — Terminal 2	P0091, P00C9	P0090, P00C8	P0092, P00C9, P00CA	P0089, P00C6, P228C, P228D, P2C1E, P2C1F, P2C20
Control — Terminal 1	P0091, P0092, P00C9	P0090, P00C8	P0092, P00CA	P0089, P00C6, P228C, P228D, P2C1E, P2C1F, P2C20

Circuit/System Description For an overview of the component/system, refer to: Fuel System Description

Circuit	Description
Control — Terminal 2	The output circuit is switched to 12 V to activate the component. The output is PWM controlled.
Control — Terminal 1	The output circuit is switched to ground to activate the component. The output is PWM controlled.

Component	Description
Fuel Pressure Regulator — G18 Fuel Pump - High Pressure	The fuel pressure regulator is a solenoid valve that restricts the flow of fuel to the high pressure fuel pump and thereby controls the pressure the pump can produce.
K20 Engine Control Module	The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly.

The fuel pressure regulator is a part of the high pressure fuel pump. The fuel pressure regulator is the solenoid valve that controls the pressure in the fuel rail. Conditions for Running the DTC P0089, P228C, P228D DTC P0016, P0017, P0018, P0019, P0090, P0091, P0092, P00C8, P00C9, P00CA, P0111, P0112, P0113, P0116, P0117, P0118, P0128, P0192, P0193, P0335, P0336, P0340, P0341, P0345, P0346, P0365, P0366, P0390, P0391, P0628 = Not set BARO = Greater than 70 kPa (10.2 PSI) Engine = Running Fuel Temperature = −10 to 132°C (14 to 270°F) IAT Sensor = Greater than −10°C (14°F) Ignition and Start Signal = Greater than 11 V Low Pressure Side of the Fuel System = Greater than 275 kPa (40 PSI) Frequency the DTC runs = Continuously — After the running conditions are met P00C6 DTC P0010, P0011, P0016, P0089, P0090, P0091, P0092, P0096, P0097, P0098, P0099, P00C8, P00C9, P00CA, P0117, P0118, P0178, P0179, P018B, P018C, P018D, P0191, P0192, P0193, P0231, P0232, P023F, P0335, P0336, P0340, P0341, P1682 = Not set BARO = Greater than 70 kPa (10.2 PSI) ECT Sensor = 42 to 132°C (43.6 to 301.4°F) Engine Run Time = 0 s Fuel Pressure Sensor = Greater than 0 kPa (0 PSI) IAT Sensor = Greater than −10°C (14°F) Run/Crank = Greater than 8 V Frequency the DTC runs = Once — Per drive cycle — After the running conditions are met P2C1E, P2C1F, P2C20 BARO = Greater than 70 kPa (10.2 PSI) Engine = Not Running Fuel Temperature = −10 to 132°C (14 to 270°F) IAT Sensor = Greater than −10°C (14°F) Ignition and Start Signal = Greater than 11 V Low Pressure Side of the Fuel System = Greater than 275 kPa (40 PSI) Frequency the DTC runs = Continuously — After the running conditions are met Conditions for Setting the DTC P0089 G18 Fuel Pump - High Pressure = Not within a calibrated range — For greater than 10 s P00C6

Desired Fuel Rail Pressure — Engine Cranking	Engine Crank Time	Engine Coolant Temperature	Fuel Rail Pressure
Less than desired	10 s	−10°C (14°F)	Actual pressure is not equal to the desired pressure
Less than desired	5 s	Warmer than 0°C (32°F)	Actual pressure is not equal to the desired pressure
Greater than desired	During the first 10 engine revolutions.	Colder than -10°C (14°F)	Pressure drops greater than 2 MPa (290 PSI)
Greater than desired	During the first 10 engine revolutions.	−10 to 16°C (14 to 92.8°F)	Pressure drops greater than 0.6 MPa (87 PSI)
Greater than desired	During the first 10 engine revolutions.	Warmer than 16°C (60°F)	Pressure drops greater than 0.45 MPa (65 PSI)

P228C, P228D, P2C1F, P2C20 The following parameters are not within 3 MPa (435 PSI) of each other: Desired Fuel Rail Pressure Fuel Rail Pressure The above condition(s) must occur for greater than 30 s. — At Idle Speed P2C1E G18 Fuel Pump - High Pressure — Control = Greater than the maximum threshold The above condition(s) must occur for greater than 10 s. Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type A DTC — Exceptions listed below DTC P0089, P00C6 = Type B DTC { P228C, P228D } Engine = Reduced Engine Power Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type A DTC — Exceptions listed below DTC P0089, P00C6 = Type B DTC Reference Information Schematic Reference Engine Controls Schematics Connector End View Reference Master Electrical Component List Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs DTC Type Reference Powertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool Reference Control Module References Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode
2. Verify DTC P0010, P0011, P0016, P0089, P0090, P0091, P0092, P0096, P0097, P0098, P0099, P00C8, P00C9, P00CA, P0117, P0118, P0178, P0179, P018B, P018C, P018D, P0191, P0192, P0193, P0231, P0232, P023F, P0335, P0336, P0340, P0341, P1682 is not set. ⇒ If any of the DTCs are set Refer to: Diagnostic Trouble Code (DTC) List - Vehicle ⇓ If none of the DTCs are set
3. Engine » Idling
4. Verify the scan tool parameter: Fuel Rail Pressure = 3 to 8.2 MPa (435 to 1200 PSI) ⇒ If not between 3 and 8.2 MPa (435 and 1200 PSI) Refer to: Circuit/System Testing ⇓ If between 3 and 8.2 MPa (435 and 1200 PSI)
5. Perform the scan tool control function: Fuel Rail Pressure » Increase & Decrease Verify the scan tool parameter: Fuel Rail Pressure = The value should change with each command. ⇒ If the value does not change Refer to: Circuit/System Testing ⇓ If the value changes
6. Clear the DTCs.

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.

7. From a stop, accelerate to 7,000 RPM with the throttle position greater than 95%. Verify the scan tool parameter: Fuel Rail Pressure = 14 to 17 MPa (2,031 to 2,466 PSI) ⇒ If not between 14 and 17 MPa (2,031 and 2,466 PSI) Refer to: Circuit/System Testing ⇓ If between 14 and 17 MPa (2,031 and 2,466 PSI)
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. Verify the DTC does not set. ⇒ If the DTC sets Refer to: Circuit/System Testing ⇓ If the DTC is not set
9. All OK. Circuit/System Testing
10. Ignition/Vehicle » Off
11. Verify the following conditions do not exist: Q17 Fuel Injector — Leaking / Restricted Camshaft Position Actuator — Binding or Sticking / Stuck Direct Fuel Injection Fuel Rail — Leaking / Restricted Fuel — Contaminated / Poor Quality Fuel Feed Pipe — Leaking / Restricted Fuel Pressure Regulator — Binding or Sticking / Stuck ⇒ If a condition exists Repair or replace as necessary ⇓ If no condition exists
12. Remove the component: G18 Fuel Pump - High Pressure
13. Inspect the component for wear or damage: Camshaft Lobe(s) ⇒ If worn Replace the component: Camshaft ⇓ If not worn
14. Test or replace the component: G18 Fuel Pump - High Pressure Component Testing

Note

As little as 2 Ω of resistance in a circuit may cause a DTC to set.

1. Ignition/Vehicle » Off
2. Disconnect the electrical connector: G18 Fuel Pump - High Pressure
3. Test for 0.9 to 1.4 Ω between the test points: Control terminal 1 & Control terminal 2 ⇒ If not between 0.9 and 1.4 Ω Replace the component: G18 Fuel Pump - High Pressure ⇓ If between 0.9 and 1.4 Ω
4. Test for infinite resistance between the test points: Each terminal of the component & The component’s housing ⇒ If less than infinite resistance Replace the component: G18 Fuel Pump - High Pressure ⇓ If infinite resistance
5. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification Camshaft Replacement Fuel Pump Replacement — G18 Fuel Pump - High Pressure