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 Descriptor

DTC P2458 59: Diesel Particulate Filter (DPF) Regeneration Time

### Circuit/System Description

This diagnostic trouble code (DTC) indicates that the engine control module (ECM) has determined that the Diesel Particulate Filter (DPF) Regeneration Time exceeds a calibrated threshold.

### Conditions for Running the DTC

The DTC runs during the DPF regeneration process.

### Conditions for Setting the DTC

The ECM determines that the DPF regeneration process time exceeds a calibrated amount.

### Action Taken When the DTC Sets

DTC P2458 is a Type C DTC.

### Conditions for Clearing the DTC

DTC P2458 is a Type C DTC.

### Circuit/System Verification

DTC P2458 is an informational DTC. Refer to Diagnostic Trouble Code (DTC) List - Vehicle for diagnosis of any other DTCs.