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Tahoe / Yukon Service Manual

DTC P1434

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 P1434 Fuel Level Sensor 1 Reference Feedback Performance Circuit/System Description The signal circuit is connected to the following control module: K111 Fuel Pump Power Control Module The control module communicates with the engine control module via serial data. Conditions for Running the DTC Ignition » On / Vehicle » In Service Mode Ignition Voltage = Greater than 11 V Conditions for Setting the DTC Invalid data received from K111 Fuel Pump Power Control Module 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 Data Communication 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 Control Module References Circuit/System Verification

  1. Ignition » On / Vehicle » In Service Mode
  2. Verify no other DTCs are set. ⇒ If other DTCs are set Refer to: Diagnostic Trouble Code (DTC) List - Vehicle ⇓ If no other DTCs are set
  3. Replace the component: K111 Fuel Pump Power Control Module
  4. Verify the DTC does not set. ⇒ If the DTC is set Replace the component: K20 Engine Control Module ⇓ If the DTC is not set
  5. 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