Cruze

DTC P0090, P0091, or P0092

The fuel pressure regulator solenoid is used to control the fuel pressure from the high pressure fuel pump to the fuel rail. The fuel pressure regulator solenoid is pulse width modulated (PWM). An ignition voltage is supplied to the fuel pressure regulator solenoid. The ECM controls the solenoid by grounding the control circuit with a solid state device called a driver.

P0090 00

The ECM detects the fuel rail pressure regulator solenoid 1 control circuit is open for less than 1 s.

P0091 00

The ECM detects the fuel rail pressure regulator solenoid 1 control circuit is shorted to ground for less than 1 s.

P0092 00

The ECM detects the fuel rail pressure regulator solenoid 1 control circuit is shorted to voltage for less than 1 s.

DTCs P0090 00, P0091 00, and P0092 00 are Type C DTCs.

DTCs P0090 00, P0091 00, and P0092 00 are Type C DTCs.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, observe the DTC information with a scan tool. DTCs P0090 00, P0091 00, or P0092 00 should not set.
2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the freeze frame/failure records data.

1. Ignition OFF, disconnect the harness connector at the Q18 Fuel Pressure Regulator.
2. Ignition ON, verify a test lamp illuminates between the ignition voltage circuit terminal 2 and ground.

⇒	If the test lamp does not illuminate, repair the ignition voltage circuit for a short to ground or an open/high resistance.

3. Ignition ON, command the Q18 Fuel Pressure Regulator ON with a Scan Tool and test for 6.5-7.5 V between the control circuit terminal 1 and ground.

⇒	If less than the specified range, test the control circuit for an open or a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.

⇒	If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.

4. Ignition OFF, test for less than 5 Ω between the control circuit terminal 2 and the K20 Engine Control Module.

⇒	If greater than the specified range, repair the control circuit for a high resistance.

5. If all circuits test normal, test or replace the Q18 Fuel Pressure Regulator.

Static Test

1. Ignition OFF, disconnect the harness connector at the Q18 Fuel Pressure Regulator.
2. Test for 6-7 Ω between the control terminal 1 and the ignition voltage terminal 2.

⇒	If not within the specified range, replace the Q18 Fuel Pressure Regulator.

3. Test for infinite resistance between each terminal and the Q18 Fuel Pressure Regulator housing.

⇒	If not the specified value, replace the Q18 Fuel Pressure Regulator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.