Skip to content
Tahoe / Yukon Service Manual

DTC P103D, P10C6, P10F5, P117A, P11FF, P128C, P128D, P128F, P135C,

Engine Controls and Fuel - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 5682733 DTC P103D, P10C6, P10F5, P117A, P11FF, P128C, P128D, P128F, P135C, P14A0, P14B6, P14CD, P14D4-P14D6, P150C, P1762, P2544, P30DE, or P314E 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 P10C6 Engine Diagnostic Status Signals Message Counter Incorrect DTC P10F5 Evaporative Emission Canister Purge Pump Status Message Counter Incorrect DTC P11FF Fuel Pump Command Signal Message Counter Incorrect DTC P128C Fuel Rail Temperature Sensor Signal Message Counter Incorrect DTC P128D Fuel Rail Temperature Sensor 2 Signal Message Counter Incorrect DTC P128F Fuel Rail Pressure Sensor and Sensor 2 Signals Message Counter Incorrect DTC P135C Cooling Fan Status Signals Message Counter Incorrect DTC P14A0 Charge Air Cooler Pump Status Signal Message Counter Incorrect DTC P14B6 Mass Air Flow Sensor Signal Message Counter Incorrect DTC P14CD Fuel Pump Power Control Module Configuration Command Signal Message Counter Incorrect DTC P14D4 Fuel Pump Power Control Module Configuration Command Signal 2 Message Counter Incorrect DTC P14D5 Fuel Pump Power Control Module Configuration Command Signal 3 Message Counter Incorrect DTC P14D6 Fuel Pump Power Control Module Configuration Command Signal 5 Message Counter Incorrect DTC P150C Transmission Control Module Engine Speed Request Signal Message Counter Incorrect DTC P1762 Transmission Mode Switch Signal Message Counter Incorrect DTC P2544 Transmission Torque Request Signal Message Counter Incorrect DTC P30DE Fuel Rail Pressure Sensor 2 Signal Message Counter Incorrect DTC P314E Fuel Heater Control Module Status Signal Message Counter Incorrect Circuit/System Description Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. Conditions for Running the DTC Ignition = On — For greater than 3 s Serial Data = Enabled Frequency the DTC runs = Continuously — After the running conditions are met Conditions for Setting the DTC Serial Data = Message Counter Incorrect — Component The above condition(s) must occur 5 times. Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type C DTC Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type C DTC Reference Information 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: Serial Data ⇒ If a related DTC is set Refer to: Diagnostic Trouble Code (DTC) List - Vehicle Publication Name 14435946* Publication Name ⇓ If a related DTC is not set
  3. Clear the DTCs.
  4. Operate the vehicle within the Conditions for Running the DTC. Verify the DTC does not set. ⇒ If the DTC sets 4.1. Ignition/Vehicle » Off 4.2. Replace the component: Transmitting Component » Refer to: Transmitting and Receiving Components 4.3. Operate the vehicle within the Conditions for Running the DTC. Verify the DTC does not set. ⇒ If the DTC sets Replace the component: Receiving Component » Refer to: Transmitting and Receiving Components ⇓ If the DTC does not set 4.4. All OK. ⇓ If the DTC does 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