P054E

DTC P054E or P054F

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 P054E
- Idle Control - Fuel Quantity Lower Than Expected

DTC P054F
- Idle Control - Fuel Quantity Higher Than Expected

Circuit/System Description

The idle speed directly depends on the injection quantity. The monitor compares the commanded injection quantity with calculated thresholds. The commanded idle fuel needs to be between 50 percent of max and min expected fuel. The expected fuel is dependent on accessory loads, Ambient temperature, baro, and engine speed.

If the actual injection quantity is lower than a calculated threshold a "Fuel Quantity Lower Than Expected" fault will be set.

If the actual injection quantity is higher than a calculated threshold a "Fuel Quantity Higher Than Expected" fault will be set.

Conditions for Running the DTC

* Ambient air temperature is above -7°C (19°F).

* Engine temperature is greater than -20°C (-4°F).

* Engine speed is between 476-1040 RPM.

* Accelerator pedal position is 0 percent.

* Vehicle speed is less than 3 km/h (1.8 mph).

* Transmission not in Park or Neutral.

* No gear change has occurred.

* PTO not engaged.

* Diesel Particulate Filter (DPF) Regeneration not active.

* No other DTCs are present.

* The DTC runs continuously when the above conditions exist.

Conditions for Setting the DTC

A fault is detected when the current fuel injection quantity is lower than the allowed limit for greater than 30 seconds.

Action Taken When the DTC Sets

DTCs P054E and P054F are Type B DTCs.

Conditions for Clearing the DTC

DTCs P054E and P054F are Type B DTCs.

Diagnostic Aids

Contaminated or improper fuel quality may cause this DTC to set.

Reference Information

Schematic Reference

Engine Controls Schematics [1][2]Electrical Diagrams

Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)

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. Observe the DTC information with a scan tool. Verify no other DTCs are set.

• If other DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.

• If no other DTCs are set

3. Verify there are no aftermarket performance enhancing devices installed on the vehicle.

4. Worn or failed accessory drive components may cause this DTC to set.

5. Verify the proper fuel is used. Refer to Fuel System Specifications [1][2]Fuel Delivery and Air Induction and Contaminants-in-Fuel Diagnosis Contaminants-in-Fuel Diagnosis.

6. 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.

• If DTC resets
Refer to Diagnostic Aids.

• If DTC does not reset

7. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.