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Home / DTC / B136A — Body Control Module Configuration Error

B136A — Body Control Module Configuration Error

Detailed page for trouble code B136A.

34,405codes
59brands
11,914generic
22,491specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
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Code

B136A

LAND ROVER B — Body

Body Control Module Configuration Error

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

Causes

  • Incorrect BCM part fitted or swapped from a different model/year
  • Incomplete or failed programming/reflashing
  • Corrupted BCM memory or EEPROM failure
  • Battery voltage drop or interrupted power during coding
  • Aftermarket modules or accessories that altered BCM configuration
  • Water ingress or connector corrosion causing data faults

Symptoms

  • Multiple body electrical features inoperative or behaving erratically (lights, locks, windows, wipers)
  • Warning lamps related to body/airbag/immobilizer or network communication illuminated
  • Modules reported as ‘missing’ or ‘not responding’ on a network scan
  • Vehicle may fail security/immobilizer checks or not start
  • Persistent BCM-related fault memory entries

What to check

  • Use a Land Rover–approved diagnostic tool to read all stored DTCs and freeze-frame data
  • Record BCM part number, software/calibration level and configured VIN from the tool
  • Check battery voltage (engine off) and while cranking; ensure stable 12.6–14.5 V during programming
  • Inspect BCM connector and pigtails for corrosion, bent pins, water damage or signs of repair
  • Verify relevant fuses and ground connections for the BCM
  • Perform a network scan to confirm other modules are present and communicating

Signal parameters

  • Battery supply to BCM: ~12–14.5 V (key on)
  • Ground continuity: near 0 Ω between BCM ground and chassis
  • CAN High idle ~2.5–3.5 V, CAN Low idle ~1.5–2.5 V (with no traffic)
  • CAN traffic present when key on: message activity visible on diagnostic tool
  • BCM responds to diagnostic requests and returns VIN/part number when correctly configured

Diagnostic algorithm

  1. Connect Land Rover approved diagnostic tool and read ALL DTCs (record freeze frame and module info).
  2. Verify battery health and attach a battery maintainer before performing programming or tests.
  3. Inspect BCM physical connections, harness, and mounting for damage or water ingress; repair as required.
  4. Check fuses/grounds for the BCM circuit and confirm correct supply voltages and CAN bus voltages.
  5. Perform a vehicle network scan to confirm presence/absence of other control modules; note any communication failures (U0xxx codes).
  6. Compare BCM part number and software/calibration level to vehicle specification and VIN information.
  7. If configuration mismatch suspected, attempt to retrieve and apply the correct coding/calibration using Land Rover diagnostic software (reprogram/reconfigure per manufacturer procedure).
  8. If programming fails or module does not accept correct coding, consider BCM repair or replacement followed by correct VIN coding and module security pairing.
  9. After repair or reprogramming, clear codes and perform a full system check and test drive to confirm normal operation.

Likely causes

  • BCM was replaced but not coded to VIN/model
  • Software/calibration level mismatch after updates
  • Battery went flat during a programming session
  • Connector pins corroded or bent at BCM
  • CAN wiring fault preventing module validation

Fault status

⚠️ Status
BCM configuration mismatch detected — stored configuration/calibration does not match vehicle requirements. Module may be incorrectly coded, incomplete program, or non-compatible unit fitted.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

U0100 U0121 U0422 B136B B1000
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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