For 1990-2009 cars

### 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 operating.

• | 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

• | Engine Control Module Connector End Views

• | Engine Controls 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

• | Scan Tool Data List

• | Scan Tool Data Definitions

• | Scan Tool Output Controls

### Circuit/System Verification

1. Ignition ON, observe the diagnostic trouble code (DTC) information with a scan tool. DTCs P2293, P2294, P2295, or P2296 should not set.
2. If the vehicle passes the Circuit/System Verification test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List.

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connector of the fuel pressure regulator solenoid 2.
2. Ignition ON, verify a test lamp illuminates between the voltage supply circuit terminal 2 and ground.

⇒ | If the test lamp does not illuminate, test the voltage supply circuit for a short to ground or an open/high resistance. If circuit/connections test normal, replace the ECM.

3. Ignition ON, measure the voltage between the control circuit terminal 1 and ground. The voltage should be within 3-4 volts.

⇒ | If less than the specified range, test for an open or a short to ground on the control circuit. If circuit/connections test normal, replace the ECM.

⇒ | If greater than the specified range, test for a short to voltage on the control circuit. If circuit/connections test normal, replace the ECM.

4. Test for less than 5 ohms of resistance on the voltage supply circuit, and the control circuit of the fuel pressure regulator 2.

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

5. If all circuits/connections test normal, test or replace the fuel pressure regulator solenoid 2.

### Component Testing

1. Measure for 4-6 ohms of resistance between the terminals of the fuel pressure regulator solenoid 2.

⇒ | If the resistance is not within the specified range, replace the fuel pressure regulator solenoid 2.

2. Test for infinite resistance between each terminal of the fuel pressure regulator solenoid 2 and the solenoid housing.

⇒ | If less than infinite resistance, 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 .