P2428
DTC P2428
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 P2428
- Exhaust Gas High Temperature
Circuit/System Description
The diesel oxidation catalyst (DOC) or catalytic converter, main function is to control emissions of Non Methane Hydro Carbons (NMHC) and soluble organic fraction (SOF). The secondary function of the catalytic converter is to assist with the diesel particulate filter (DPF) regeneration, by obtaining and sustaining the temperature necessary for regeneration. The engine control module (ECM) monitors the exhaust gas temperature (EGT) sensors.
Conditions for Running the DTC
* DTC P0545, P0546, P2032, P2033, P2080, P2084, P242B, P242C, P242D, P246F, P2470 and P2471 are not set.
* The engine speed is greater than 600 RPM.
* The DTCs run continuously once the above conditions are met.
Conditions for Setting the DTC
The ECM detects any two exhaust gas temperature sensors are greater than 800°C (1,472°F) for greater than 6 s.
Action Taken When the DTC Sets
* DTCs P2428 is a Type A DTC.
* The driver information center, if equipped, displays Reduced Engine Power message.
Conditions for Clearing the DTC
DTCs P2428 is a Type A DTC.
Diagnostic Aids
* If the engine has sat overnight, all EGT sensor values should be within 3°C (5°F).
* After starting a cold engine, the EGT sensors temperature should rise steadily, then stabilize.
* High resistance in any of the circuits of the EGT sensors could set a DTC.
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 Reference
Exhaust Aftertreatment System Description Exhaust Aftertreatment 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. Verify no other DTCs are set.
• If any other DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle
• If other DTCs are not set
3. Measure and record the resistance of the B131 exhaust gas temperature sensor 1, 2, 3, and 4. Compare the measurements to the Temperature Versus Resistance (Fuel Temperature Sensor) Temperature Versus Resistance (Fuel Temperature Sensor)Temperature Versus Resistance (ECT Sensors) Temperature Versus Resistance (ECT Sensors)Temperature Versus Resistance (IAT Sensor 1) Temperature Versus Resistance (IAT Sensor 1)Temperature Versus Resistance (IAT Sensor 2) Temperature Versus Resistance (IAT Sensor 2)Temperature Versus Resistance (EGT Sensors) Temperature Versus Resistance (EGT Sensors)Temperature Versus Resistance (EGR Temperature Sensors) Temperature Versus Resistance (EGR Temperature Sensors)Temperature Versus Resistance (Emission Reduction Fluid Injector) [1][2]Diesel Emissions Fluid (DEF) System table. The resistance values should be within the specified range indicated in the table.
• If not within the specified range
Replace the appropriate B131 exhaust gas temperature sensor
• If within the specified range
4. Remove the Q57 indirect fuel injector outlet nozzle from the exhaust. Connect a piece of hose to the Q57 indirect fuel injector outlet nozzle and place the other end into a suitable container.
5. Engine idling, observe the Q57 indirect fuel injector. The injector should not be leaking.
• If a leak is found
Replace the Q57 indirect fuel injector
• If no leak is found
6. Inspect for the following conditions:
* Leaks in the exhaust system-Refer to Exhaust Leakage Testing and Inspection.
* Leaks in the intake air ducts and the turbocharger ducts. Perform the Induction System Smoke Test in Charge Air Cooler Diagnosis (Full System Air Leak Test) Charge Air Cooler Diagnosis (Full System Air Leak Test)Charge Air Cooler Diagnosis (Induction System Smoke Test) Charge Air Cooler Diagnosis (Induction System Smoke Test).
* Leaking Q17 fuel injectors-Refer to Fuel Injector Diagnosis Fuel Injector Diagnosis
* Engine cooling system condition-Refer to Engine Overheating Engine Overheating
* An engine mechanical condition-Refer to Symptoms - Engine Mechanical Symptoms - Engine Mechanical.
• If a condition is found
Repair as necessary
• If no condition is found
7. Inspect the SCR/DPF and the DOC for any of the following conditions:
* Physical damage or alterations
* Internal rattles caused by a damaged catalyst substrate
* Internal restrictions--Refer to Restricted Exhaust Testing and Inspection.
• If a condition is found
Replace the SCR/DPF or the DOC
• If no condition is found
8. 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.
9. Verify a DTC does not set.
• If any DTCs set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle
• If no DTCs set
10. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Catalytic Converter Replacement (L20,LMF) Service and RepairCatalytic Converter Replacement (V6) Service and RepairCatalytic Converter Replacement (LGH) Service and RepairCatalytic Converter Replacement (LC8,L96) Service and Repair
* Exhaust Temperature Sensor Replacement - Position 1 Exhaust Temperature Sensor Replacement - Position 1
* Exhaust Temperature Sensor Replacement - Position 2 Exhaust Temperature Sensor Replacement - Position 2
* Exhaust Temperature Sensor Replacement - Position 3 Exhaust Temperature Sensor Replacement - Position 3
* Exhaust Temperature Sensor Replacement - Position 4 Exhaust Temperature Sensor Replacement - Position 4
* Exhaust Particulate Filter Replacement (LGH-35 Series) Exhaust Particulate Filter Replacement (35 Series)Exhaust Particulate Filter Replacement (LGH) Exhaust Particulate Filter Replacement
* Indirect Fuel Injector Replacement Service and Repair
* Perform the following scan tool reset procedures after replacing the SCR/DPF:
- NOx Catalyst Reductant Loading Reset
- NOx Catalyst Reset
- DPF/Catalyst 2 Reset
- Perform Diesel Particulate Filter (DPF) Service Regeneration Diesel Particulate Filter (DPF) Service Regeneration
* Perform the following scan tool reset procedures after replacing the DOC:
- NOx Catalyst Reductant Loading Reset
- Perform the scan tool Diesel Particulate Filter (DPF) Regeneration Enable Diesel Particulate Filter (DPF) Regeneration Enable procedure if the scan tool DPF Soot Mass is less than 30 g. If the scan tool DPF Soot Mass is 30 g or greater, perform the Diesel Particulate Filter (DPF) Service Regeneration Diesel Particulate Filter (DPF) Service Regeneration procedure.