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Tahoe / Yukon Service Manual

DTC P10F4 or P20FF

Engine Controls and Fuel - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 5030897 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 P10F4 Reductant Control Module Not Programmed DTC P20FF Reductant Control Module Performance Circuit/System Description This diagnostic applies to microprocessor integrity conditions within the control module. This diagnostic also checks if the control module is not programmed, or is programmed incorrectly. Conditions for Running the DTC Ignition = On Frequency the DTC runs = Continuously — After the running conditions are met Conditions for Setting the DTC Control Module = Internal Malfunction or System Programming Malfunctions Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type A DTC Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type A DTC Diagnostic Aids A weak battery, low component/system voltage, or poor connections may cause this DTC to set. Reference Information 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 DTC P10F4 is not set. ⇒ If the DTC is set 2.1. Perform all necessary programming and setup procedures for the control module: K115  Reductant Control Module 2.2. Verify the DTC does not set. ⇒ If the DTC sets » Replace the component: K115 Reductant Control Module ⇓ If the DTC does not set 2.3. All OK. ⇓ If the DTC is not set
  3. Verify DTC P20FF is not set. ⇒ If the DTC is set Replace the component: K115 Reductant Control Module ⇓ If the DTC is not set
  4. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification For control module replacement, programming, and setup refer to: Control Module References