2014 Chevrolet Impala Limited LSFACTORY OEM SERVICE PROCEDURE

Circuit/System Verification

WARNING: This page is about a different car, the 2014 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • DTC P15F6 is an informational DTC.
  • Diagnose any other DTCs set in the K20 Engine Control Module prior to diagnosing DTC P15F6.
  1. Verify there are no DTCs set in the K20 Engine Control Module and there are no communication DTCs set in any control module
    • If no other DTC are set 
  2. Verify there are no intermittent serial data circuit fault. Refer to Scan Tool Does Not Communicate with High Speed GMLAN Device .
    • If an intermittent serial data circuit fault is found 

      Repair as necessary.

    • If an intermittent serial circuit fault is not found 
  3. Clear all DTCs and operate the vehicle in the conditions that the customer experienced.
  4. Verify that DTC P15F6 does not set.
    • If the DTC sets 

      Replace K14 Distance Sensing Cruise Control Module

    • If the DTC does not set 
  5. All OK.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.