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Tahoe / Yukon Service Manual

DTC P241F

Engine Controls and Fuel - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 5508871 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 P241F Exhaust Gas Recirculation 2 Cooling System Performance Circuit/System Description For an overview of the component/system, refer to: Exhaust Gas Recirculation (EGR) System Description Conditions for Running the DTC DTC P262B = 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 – 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 – Q14 Exhaust Gas Recirculation Valve – Q97 Engine Coolant Flow Control Valve Ambient Air Temperature = Warmer than −20°C (−4°F) Barometric Pressure = Greater than 69.6 kPa (10.1 PSI) Engine = Running Engine Coolant Temperature = 70 to 130°C (158 to 266°F) Engine Speed. = 660 to 5,100 RPM Ignition and Start Switch Signal = Greater than 11 V Frequency the DTC runs = Continuously — After the running conditions are met — For greater than 20 s Conditions for Setting the DTC EGR Cooler = Not within a calibrated range Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type B DTC Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type B DTC 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 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 Q14 Exhaust Gas Recirculation Valve Q97 Engine Coolant Flow Control 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 condition does not exist: Cooling System — Leaking / Restricted EGR Cooler — Restricted / Visible Damage ⇒ If a condition exists Repair or replace as necessary ⇓ If no condition exists
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  5. Verify the DTC does not set. ⇒ If the DTC sets Replace the component: EGR Cooler ⇓ If the DTC is not set
  6. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification Exhaust Gas Recirculation Cooler Replacement For control module replacement, programming, and setup refer to: Control Module References