B0731

Code

Generic B — Body

Body Control Module Configuration Mismatch

Brand: Generic

Type: B — Body

Views: UK: 6 EN: 7 RU: 13

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Page language: EN

Incorrect or incomplete BCM programming or software update
Replacement BCM with wrong part number or software level
Corrupted configuration memory (EEPROM) in the BCM
Mismatch between vehicle option coding/VO and BCM configuration
Loss of communication on vehicle networks (CAN/LIN) causing configuration read errors
Battery disconnect or low voltage during programming

Instrument cluster or message center displays configuration or programming warnings
Doors, locks, lighting, or other body functions operate incorrectly or inconsistently
New or replacement BCM not accepting key/immobilizer signals; vehicle may not start
Multiple related modules showing communication or configuration errors
Random electrical oddities after BCM replacement or software update
Stored DTCs related to module configuration, communication, or coding

Read all stored and pending DTCs from BCM and other network modules; record freeze frame and related codes
Compare BCM part number, software/calibration version, and coding against vehicle build data / service information
Check vehicle battery voltage and charging system; confirm >12.4 V during programming attempts
Inspect BCM connectors and wiring for corrosion, bent pins, damaged insulation, or poor grounds
Verify CAN/LIN bus integrity: continuity, proper termination resistances, and absence of short to power/ground
Check for aftermarket devices tied into vehicle network or body wiring

Capture full network scan and note all related codes from BCM and other modules. Address any communication errors first.
Verify battery state of charge and ensure stable power supply; recharge or connect battery maintainer before programming.
Inspect BCM harness, connectors and grounds; repair any damage and ensure solid connections.
Confirm BCM part number and software level match vehicle specifications. If wrong part installed, obtain correct BCM.
Retrieve vehicle order (VO) / option coding from other modules or dealer data and compare with BCM configuration.
If configuration mismatch is confirmed, attempt to reprogram / recode BCM per factory procedure (load correct calibration and VO).
Re-run module security/immobilizer pairing if required after programming (follow manufacturer steps to ensure keys are recognized).
If programming fails or EEPROM appears corrupted, consider reflashing, performing a software recovery, or replacing BCM; follow exact OEM replacement and coding procedures.
After changes, clear codes, cycle power, and verify proper operation of body functions and that no configuration faults return during a road or function test.
If problems persist, escalate with manufacturer technical support and check for updated software/TSBs.

BCM was replaced but not coded to vehicle (VIN, options, immobilizer) or wrong calibration installed
Software update interrupted or applied incorrectly leaving inconsistent parameter sets
CAN bus wiring fault or connector corrosion preventing the BCM from reading vehicle option data
Stored configuration was corrupted after a power surge or failed write cycle
Immobilizer or gateway module reporting different vehicle order (VO) than BCM