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Tahoe / Yukon Service Manual

DTC P2458

Engine Controls and Fuel - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 5500958 Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor DTC P2458 Particulate Filter Regeneration Time Too Long Circuit/System Description For an overview of the component/system, refer to: Exhaust Aftertreatment System Description Conditions for Running the DTC DPF Regeneration = Active Frequency the DTC runs = Continuously — After the running conditions are met Conditions for Setting the DTC Particulate Filter Regeneration Abort Counter = Greater than 30 count(s) Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type C DTC Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type C DTC Reference Information DTC Type Reference Powertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool Reference Control Module References Circuit/System Verification

  1. Ignition » On / Vehicle » In Service Mode
  2. Verify there are no DTCs set related to the following component/system: – B17 Barometric Pressure Sensor – B75C Multifunction Intake Air Sensor – B154 Diesel Particulate Filter Exhaust Differential Pressure Sensor – Q14 Exhaust Gas Recirculation Valve ⇒ If a related DTC is set Refer to: Diagnostic Trouble Code (DTC) List - Vehicle ⇓ If a related DTC is not set
  3. Verify the following conditions do not exist: Exhaust System — Leaking / Loose Clamps / Restricted / Visible Damage Hoses / Lines @ B154 Diesel Particulate Filter Exhaust Differential Pressure Sensor — Blocked / Kinked / Leaking / Missing / Restricted / Visible Damage ⇒ If a condition exists Repair or replace as necessary ⇓ If no condition exists
  4. Perform the following procedure/test: DPF Service Regeneration » Refer to: Particulate Filter Service Regeneration ⇒ If the procedure was not successful Replace the component: Diesel Particulate Filter ⇓ If the procedure was successful
  5. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification Nitrogen Oxides Catalytic Converter Replacement — With Particulate Filter Perform the scan tool function: DPF Reset