GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Avalanche - 4WD 🢒 Hybrid 🢒 Hybrid Controls 🢒 DTC P16F3

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P16F3: Control Module Redundant Memory Performance

Circuit/System Description

This diagnostic applies to internal microprocessor integrity conditions within the hybrid powertrain control module (HPCM). The HPCM monitors its ability to read and write to the memory. The HPCM processor stores identical data in two locations and compares the data to verify that the stored data is correct.

Conditions for Running the DTC
    • The control module runs the program to detect an internal fault when the key is ON.
    • Ignition voltage is 8-18 volts.

Conditions for Setting the DTC

The control module has detected that identical stored data is not the same when retrieved.

Action Taken When the DTC Sets
    • DTC P16F3 is a Type A DTC.
    • The HPCM commands the battery energy control module (BECM) to open the high voltage contactor relays.

Conditions for Clearing the DTC

DTC P16F3 is a Type A DTC.

Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification
  1. Inspect for DTC P1AC6, P0335, or any communication U-code DTCs.
    2. ⇒If the specified DTCs are set, repair them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle.
  2. Clear the DTC information.
  3. Turn the ignition OFF for 1 minute.
  4. Turn the ignition ON.
  5. Retest for DTC P16F3.

Circuit/System Testing
  1. Inspect for DTC P1AC6, P0335, or any communication DTCs.
    2. ⇒If the specified DTCs are set, repair them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle.
  2. Program the PIM with the latest software version and recheck for DTCs.
    3. ⇒If the DTC resets after programming or if the PIM already contains the latest software version, replace the PIM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for PIM replacement, setup, and programming.