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DTC codes / B04xx · Airbags, seats, doors, lights and comfort systems / B0455

B0455Display Module Internal Failure

B0455 indicates that the body control module (BCM) or a dedicated display control module has detected an internal fault within the driver information display module itself. The module's self-test routines have identified a failure in its internal circuitry, memory, or processing, which can prevent the display from powering up, showing correct data, or responding to commands.

SystemBody
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

  • The information display screen remains blank or dark even when the ignition is on
  • Intermittent flickering, dimming, or partial segments missing on the display
  • Warning chimes or other functions tied to the display module stop working
  • The display shows garbled characters or incorrect values that do not match actual vehicle conditions
  • Often no symptoms besides the warning light if the fault is stored but the display still functions
  • Other body control features (like trip computer or settings menus) become inaccessible

Common causes, most likely first

  1. Internal failure of the display module's circuit board or power supply components
  2. Corroded or loose electrical connectors at the back of the display module
  3. Damaged wiring harness between the body control module and the display module
  4. Low or unstable battery voltage causing the module's self-test to fail
  5. Software corruption or failed firmware update within the display module
  6. Water intrusion or physical damage to the display module housing
  7. Failed solder joints or aging capacitors inside the display module

How to diagnose and fix it

  1. Verify battery voltage and charging system output; a weak battery can trigger false internal fault codes
  2. Inspect and clean the display module connectors and check for tight fit and corrosion
  3. Perform a wiggle test on the wiring harness while watching live display data to spot intermittent connections
  4. Clear the code and recheck after a test drive to confirm whether the fault is hard or intermittent
  5. Check for technical service bulletins (TSBs) or software updates specific to the display module for your vehicle
  6. If the fault persists, replace the display module with a known-good unit and recheck for the code
  7. After replacement, perform any required module programming or configuration so the new display communicates correctly

What the display module self-test really means

  • A B0455 can be stored intermittently due to a momentary voltage drop during engine cranking, so always check battery health before condemning the display.
  • Many display modules are part of a networked infotainment system; a fault in another module on the same bus can sometimes cause the display module to log an internal error.
  • Replacing the display module without checking for water leaks or damaged seals often leads to repeat failures, especially on vehicles with sunroof drains or windshield leaks.
  • Some vehicles require the display module to be configured or programmed after installation; a used module from another vehicle may not work without proper setup.
  • The code does not always mean the display is dead; it can set when the module's internal memory fails a checksum test while the screen still works normally.

Can I keep driving with B0455?

The vehicle is generally safe to drive if the display is the only affected system and you can rely on other gauges, but avoid long trips until the fault is diagnosed. If the display failure also affects warning indicators or safety alerts, have the vehicle inspected promptly.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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