B14C5

Code

Generic B — Body

Body Control Module — Internal EEPROM Fault

Brand: Generic

Type: B — Body

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Stored B14C5 (BCM EEPROM) DTC and possibly other related DTCs
BCM-controlled systems intermittent or inoperative (lights, locks, wipers, windows, alarms, body lighting)
Module does not respond or intermittently responds to scan tool
Configuration options lost (e.g., learned keys, comfort settings)
Vehicle may show multiple unrelated faults due to invalid data

Read all stored codes and freeze frame with a dealer-level or capable scan tool; note related network faults
Verify battery/resting voltage and charging system voltage at the time of inspection
Inspect BCM connectors, pins, and harness for corrosion, water intrusion, bent pins or damage
Check BCM power and ground circuits for proper voltage, continuity and resistance to chassis ground
Monitor CAN/LIN bus traffic to confirm module presence/heartbeat and no bus-off conditions
Check OEM service information/TSBs for known BCM EEPROM issues and required software

Record all DTCs, freeze frame and current module software/part numbers. Save or print reports for reference.
Confirm basic power: measure battery voltage, then with ignition ON measure B+ at BCM power pins and ground continuity to chassis. Repair any low voltage or bad grounds.
Visually inspect BCM and connector for contamination, corrosion, water damage, loose pins, or physical issues. Repair connectors/harness as needed.
Attempt communication with the BCM using an OEM-level scan tool. If tool cannot communicate, verify CAN/LIN bus wiring and termination; repair bus faults first.
If communication is possible, query EEPROM/checksum/CRC status and try clearing the code. Cycle ignition and re-scan to see if the DTC returns.
Check vehicle service information for required software updates or reflash procedures. If an update is available, perform reprogramming per OEM procedure (follow battery power and tool requirements).
If reprogram/reflash fails or EEPROM reports persistent internal fault, follow OEM guidance for module re-initialization, module replacement or EEPROM repair procedure. Back up any programmable data (VIN, coding) before replacement.
After repair/reprogramming or module replacement, re-code/reprogram module as required, clear codes, and perform full system verification and road test to confirm fault is resolved.
If fault persists after replacement and correct wiring/power confirmed, escalate to manufacturer diagnostics or consider component-level repair by a specialist.