GM Service Manual Online
For 1990-2009 cars only

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.