LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2013 >> Encore Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC U0255-U0257: Lost Communication with Infotainment Module >> Circuit/System Verification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Verification

WARNING: This page is about a different car, the 2016 Chevrolet Trax and 2016 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, A11 Radio ON.
  2. Verify the P17 Info Display Module turns on and information is shown on the display.
    • If the P17 Info Display Module turns on and information is shown on the display. 
  3. Verify that all radio controls operate and perform the correct function.
    • If some, but not all, controls operate normally. 

      Replace the appropriate A20 Radio/HVAC Controls or the A22 Radio Controls.

    • If all controls operate and perform the correct function. 
  4. All OK.