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Tahoe / Yukon Service Manual

DTC P2002

Engine Controls and Fuel - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 5507262 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 P2002 Particulate Filter Low Efficiency Circuit/System Description For an overview of the component/system, refer to: Exhaust Aftertreatment System Description Conditions for Running the DTC DTC P200C = Not set DTCs related to the following system/component = Not Set – B9 Ambient Air Temperature Sensor – B17 Barometric Pressure Sensor – B26 Crankshaft Position Sensor – B34 Engine Coolant Temperature Sensor – B47B Fuel Rail Pressure Sensor – B65 Intake Manifold Pressure and Air Temperature Sensor – B75C Multifunction Intake Air Sensor – B115 Vehicle Speed Sensor – B130 Exhaust Gas Recirculation Temperature Sensor – B131 Exhaust Temperature Sensor – B136 Exhaust Particulate Matter Sensor – B154 Diesel Particulate Filter Exhaust Differential Pressure Sensor – B195 Nitrogen Oxides Sensor – B345R Exhaust Pressure Differential Sensor - Exhaust Gas Recirculation – M103 Turbocharger Vane Position Actuator – Q14 Exhaust Gas Recirculation Valve – Q17 Fuel Injector – Q38 Throttle Body Ambient Air Temperature = Warmer than −20°C (−4°F) Engine = Cranking / Running or Autostop = Active Ignition and Start Switch Signal = Greater than 11 V Nitrogen Oxides Sensor Heater Operation = Allowed Particulate Matter Sensor Operation = Ready Frequency the DTC runs = Continuously — After the running conditions are met Conditions for Setting the DTC Particulate Matter Sensor Soot Accumulation = Greater than a predefined threshold Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type A Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type A Reference Information Schematic Reference Engine Controls Schematics Connector End View Reference Master Electrical Component List Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs 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: – B9 Ambient Air Temperature Sensor – B17 Barometric Pressure Sensor – B26 Crankshaft Position Sensor – B34 Engine Coolant Temperature Sensor – B47B Fuel Rail Pressure Sensor – B65 Intake Manifold Pressure and Air Temperature Sensor – B75C Multifunction Intake Air Sensor – B115 Vehicle Speed Sensor – B130 Exhaust Gas Recirculation Temperature Sensor – B131 Exhaust Temperature Sensor – B136 Exhaust Particulate Matter Sensor – B154 Diesel Particulate Filter Exhaust Differential Pressure Sensor – B195 Nitrogen Oxides Sensor – B345R Exhaust Pressure Differential Sensor - Exhaust Gas Recirculation – M103 Turbocharger Vane Position Actuator – Q14 Exhaust Gas Recirculation Valve – Q17 Fuel Injector – Q38 Throttle Body ⇒ 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: Induction System — Leaking / Restricted » Refer to: Component/System Leak Test Exhaust System / Turbocharger — Leaking / Restricted » Refer to: Exhaust Leakage ⇒ If a condition exists Repair or replace as necessary ⇓ If no condition exists
  4. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification