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Home / DTC / B134E — Body Control Module — internal memory checksum error

B134E — Body Control Module — internal memory checksum error

Detailed page for trouble code B134E.

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Code

B134E

LAND ROVER B — Body

Body Control Module — internal memory checksum error

Brand: LAND ROVER
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Corrupted BCM EEPROM/flash contents
  • Interrupted or failed module reprogramming/update
  • Low or unstable battery voltage during programming or operation
  • Water ingress or corrosion at the BCM or connectors
  • Internal BCM hardware failure
  • Aftermarket accessories or improper wiring causing data corruption

Symptoms

  • Multiple body electrical faults/warning lights (central locking, lighting, wipers, etc.)
  • Loss or intermittent loss of communication with BCM on diagnostic tool
  • Vehicle may show other module U-codes (communication errors)
  • Non-functional convenience features (keyless entry, interior lights, sequenced functions)
  • Stored BCM-related DTCs and possible limp/limited functionality

What to check

  • Read and record all stored DTCs and freeze-frame data from all modules
  • Check battery state of charge and resting voltage (should be >=12.4V); measure during cranking
  • Verify good chassis and engine ground connections and battery terminals are clean/tight
  • Visually inspect BCM and connector for water ingress, corrosion, bent pins or damage
  • Inspect related fuses, wiring harness and connectors (especially to fusebox/BCM mount)
  • Check for recent software updates, reprogramming events or aftermarket installations

Signal parameters

  • VBATT (battery supply voltage to BCM) — resting and cranking
  • IGN status (IGN1/IGN2) and ignition switch input
  • CAN high/low activity and bit-rate, number of CAN errors/frames
  • BCM internal EEPROM/flash checksum value or integrity flag (if available)
  • Module boot status, bootloader entry and uptime
  • Stored software part number and calibration ID (SW/Cal)

Diagnostic algorithm

  1. Connect a professional diagnostic tool; read and log all DTCs and freeze-frame data from the BCM and other modules. Note any related U-codes.
  2. Verify battery voltage (resting and during cranking). If low, charge battery or connect a stable power supply before further testing or reprogramming.
  3. Inspect BCM area and connectors for moisture, corrosion, damaged pins or loose connectors. Repair any wiring/connectors found damaged.
  4. Verify grounds and main power feeds to the BCM are secure and have low resistance. Repair as required.
  5. Check CAN bus for errors: measure CAN high/low voltages with ignition ON, and check for excessive error counters via diagnostic tool.
  6. If no obvious hardware issues, attempt to clear the DTC and cycle ignition; see if B134E returns. If it reappears, proceed to software checks.
  7. Confirm current BCM software/firmware and compare with manufacturer release. If a known update or corruption is suspected, follow Land Rover service procedures to re-flash/reprogram the BCM using approved tooling and stable power.
  8. If reprogramming fails or the module will not accept programming, inspect tool compatibility and vehicle preparation steps (battery charger, ignition on procedure). Retry using manufacturer-approved procedures.
  9. If module still reports internal memory checksum errors after successful re-flash attempts or cannot be reprogrammed, consider BCM replacement and program/configure the new BCM with vehicle-specific data (VIN, keys, modules).
  10. After repair/reprogramming, clear codes, verify functionality of body systems, and road-test to confirm no recurrence. Re-scan all modules for any related faults.

Likely causes

  • BCM software became corrupted during a previous software update or VIN coding operation
  • Poor battery/ground condition during module write or start-up
  • Physical damage, moisture or corrosion inside BCM housing or connector
  • Intermittent CAN bus errors leading to incomplete data writes
  • A failing BCM (internal memory chip or controller) requiring replacement

Fault status

⚠️ Status
BCM internal memory checksum error — module detected corrupted or inconsistent non-volatile memory contents.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-4.0 hours

Similar codes

B134A B134C B134D U0100 U0073
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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