GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Optra 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 DTC P2293, P2294, P2295, or P2296

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P2293: Fuel Pressure Regulator Solenoid 2 Control Circuit Performance

DTC P2293 11: Fuel Pressure Regulator Solenoid 2 Control Circuit Performance Above Maximum Threshold

DTC P2293 12: Fuel Pressure Regulator Solenoid 2 Control Circuit Performance Below Minimum Threshold

DTC P2293 18: Fuel Pressure Regulator Solenoid 2 Control Circuit Performance Signal Amplitude Less Than Minimum

DTC P2293 19: Fuel Pressure Regulator Solenoid 2 Control Circuit Performance Signal Amplitude Greater Than Maximum

DTC P2294: Fuel Pressure Regulator Solenoid 2 Control Circuit

DTC P2294 01: Fuel Pressure Regulator Solenoid 2 Control Circuit Short to Battery

DTC P2294 02: Fuel Pressure Regulator Solenoid 2 Control Circuit Short to Ground

DTC P2294 04: Fuel Pressure Regulator Solenoid 2 Control Circuit Open

DTC P2294 54: Fuel Pressure Regulator Solenoid 2 Control Circuit Temperature High

DTC P2295: Fuel Pressure Regulator Solenoid 2 Control Circuit Low Voltage

DTC P2296: Fuel Pressure Regulator Solenoid 2 Control Circuit High Voltage

Circuit/System Description

The Fuel Pressure Regulator Solenoid 2 is used to control the fuel pressure at the fuel rail. The Fuel Pressure Regulator Solenoid 2 is pulse width modulated (PWM). The engine control module (ECM) supplies the voltage directly to the Fuel Pressure Regulator Solenoid 2. The ECM controls the solenoid by grounding the control circuit with a solid state device called a driver.

Conditions for Running the DTC
    • The ignition is ON, or the engine is running.
    • The ignition voltage is less than 16 volts.
    • The DTCs runs continuously once the above conditions are met.

Conditions for Setting the DTC

P2293 00, P2293 11, P2293 12, P2293 18, P2293 19

The ECM detects the Fuel Pressure Regulator Solenoid 2 Control Circuit is not within limits for less than 1 second.

P2293 04

The ECM detects the Fuel Pressure Regulator Solenoid 2 Control Circuit is open for less than 1 second.

P2294 02, P2294 54, P2295

The ECM detects the Fuel Pressure Regulator Solenoid 2 Control Circuit is shorted to ground for less than 1 second.

P2294 01, P2296

The ECM detects the Fuel Pressure Regulator Solenoid 2 Control Circuit is shorted to voltage for less than 1 second.

Action Taken When the DTC Sets
    • DTC P2293 00 is a type A DTC.
    • DTCs P2293 11, P2293 12, P2293 18, P2293 19, P2294, P2295, and P2296 are Type B DTCs.

Conditions for Clearing the DTC
    • DTC P2293 00 is a type A DTC.
    • DTCs P2293 11, P2293 12, P2293 18, P2293 19, P2294, P2295, and P2296 are Type B DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Fuel System Description

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 for scan tool information

Circuit/System Verification
  1. Ignition ON, observe the DTC information with a scan tool. DTCs P2293, P2294, P2295, or P2296 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.

Circuit/System Testing
  1. Ignition OFF, disconnect the harness connector at the fuel pressure regulator solenoid 2.
  2. Ignition ON, verify a test lamp illuminates between the ignition 1 voltage circuit terminal 2 and ground.
    3. ⇒If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground or an open/high resistance. If circuit tests normal, replace the ECM.
  3. Ignition ON, test the voltage between the control circuit terminal 1 and ground. The voltage should be within 3-4 volts.
    4. ⇒If less than the specified range, test the control circuit for an open or a short to ground. If circuit tests normal, replace the ECM.
    ⇒If greater than the specified range, test the control circuit for a short to voltage. If circuit tests normal, replace the ECM.
  4. Test for less than 5 ohms on the ignition 1 voltage circuit, and the control circuit.
    5. ⇒If greater than the specified range, repair the appropriate circuit for a high resistance.
  5. If all circuits test normal, test or replace the fuel pressure regulator solenoid 2.

Component Testing
  1. Ignition OFF, disconnect the harness connector at the fuel pressure regulator solenoid 2.
  2. Test for 4-6 ohms between the control terminal 1 and the ignition 1 voltage terminal 2.
    3. ⇒If not within the specified range, replace the fuel pressure regulator solenoid 2.
  3. Test for infinite resistance between each terminal and the solenoid fuel pressure regulator solenoid 2 housing.
    4. ⇒If not the specified value, replace the fuel pressure regulator solenoid 2.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Fuel Pressure Regulator Replacement
    •  Control Module References for ECM replacement, setup, and programming

Repair Verification

Ignition ON, observe the scan tool DPF soot mass parameter. The parameter should be less than 24 grams.

⇒If greater than the specified range, perform a DPF service regeneration. Refer to Exhaust Particulate Filter Cleaning.