B0572

Code

Generic B — Body

Manufacturer-specific body control module fault (B0572)

Brand: Generic

Type: B — Body

Views: UK: 13 EN: 10 RU: 9

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Intermittent or low battery/charging system voltage
Corroded, loose or damaged BCM power/ground connections
Faulty BCM hardware or internal processor error
CAN bus or LIN network communication fault (open/short/interference)
Corroded or water-damaged BCM or connector
Software/configuration corruption or failed reflash/update

Symptoms

One or more body electrical functions inoperative or intermittent (locks, lights, windows, wipers, interior lights)
Keyless entry or immobilizer problems / no start conditions on some vehicles
Multiple related or network communication DTCs present
Instrument cluster warning lamps related to body systems
Unexpected relays operating, false alarms or battery drain

What to check

Read DTC with manufacturer-capable scan tool; record freeze-frame and related codes
Check battery state-of-charge and charging system voltage (engine off and running)
Visually inspect BCM connector(s) for corrosion, water, bent pins or debris
Verify fuses and relays for BCM circuits
Verify primary power and ground continuity to the BCM
Scan bus for CAN/LIN communication status and module presence

Signal parameters

Battery voltage (KOEO ~12.0–12.8V; running 13.5–14.8V)
Ignition input signal to BCM (key on/off logic levels)
CAN High / CAN Low idle voltages (approx. 2.5V each; verify differential signalling and dominant states)
Presence/response of BCM on scan tool (module online/offline)
Specific BCM outputs when commanded (door lock, interior lights, window motor) as reported by scan tool

Diagnostic algorithm

Read and record code details, freeze frame data and any additional stored modules/codes with a capable scan tool.
Check battery voltage and charging system; ensure good battery state and stable voltage during testing and any programming.
Perform a visual inspection of the BCM and harness: look for water, corrosion, damaged wires, and secure connector retention.
Verify all BCM fuses/relays and power/ground circuits with a multimeter; repair any poor connections.
Scan the CAN/LIN networks for lost communication or other modules reporting faults (U-codes). Use scope if needed to confirm bus signal integrity.
If communications and power are good, attempt BCM soft reset using manufacturer procedure (clear codes, cycle power, or perform commanded restart via scan tool).
Check for and apply any manufacturer software/firmware updates or reflash the BCM per service procedure; follow safe power-backup steps during programming.
If fault persists after verifying wiring, power, and software, consider replacing the BCM and program/configure new module per manufacturer instructions. Re-test all related functions.
After repair or reflash, clear codes and perform function verification and road test to confirm issue is resolved.

Likely causes

Low or unstable battery/charging voltage during operation or programming
Poor ground or power connections at the BCM
Loss of CAN/LIN communications between BCM and other modules
Corroded/wet BCM connectors or internal water ingress
Failed BCM or software/firmware corruption after update

Fault status

⚠️ Status

Manufacturer-specific BCM fault recorded. Indicates internal BCM error, communication failure, power/ground issue, or corrupted configuration/firmware. Refer to manufacturer service data for exact meaning and repair procedure.

🔴 Repair difficulty: Hard

⏱️ Diagnostic time: 1.5 - 3.0 hours