Hyundai Electrical Diagnostics
Hyundai uses a Body Control Module (BCM), a Central Gateway (CGW), and G-Scan diagnostics. Common faults include BCM body and locking issues, smart-key and immobiliser faults, and charging warnings. Higher-spec models carry additional ADAS and infotainment systems.
Hyundai Control Modules & Electronics
Key modules and electronic systems used across Hyundai vehicles. Correct identification of the module is the first step in proper diagnosis.
BCM — Body Control Module
Central body electronics.
CGW — Central Gateway
Network communication.
Engine / EV ECU
Powertrain management.
Smart Key / Immobiliser
Keyless and security.
ADAS
Highway Driving Assist / camera + radar.
Common Hyundai Electrical Faults
Faults we frequently see on Hyundai vehicles. Each links to a detailed, all-makes guide covering symptoms, causes and our diagnostic approach.
Body Control Module (BCM) Faults
Central body electronics controlling locking, lighting, wipers and comfort.
READ GUIDEKey Not Detected
Vehicle doesn't recognise the key — won't start or unlock.
READ GUIDEABS Warning Light
ABS warning on — stability and braking-system fault.
READ GUIDEBattery Warning Light & Vehicle Not Charging
Charging-system fault — battery warning or vehicle not charging.
READ GUIDEParking Assist Unavailable
Parking sensors or park assist not working.
READ GUIDEAirbag / SRS Warning Light
Airbag or SRS warning light on — restraint-system fault.
READ GUIDEElectric Power Steering Fault
EPS warning — steering assistance reduced or unavailable.
READ GUIDEAir Suspension Faults
Air-suspension warning — ride-height or compressor fault.
READ GUIDECAN Bus / Network Communication Faults
Network communication fault affecting multiple modules.
READ GUIDEHyundai Models We Cover
Hyundai Electrical Fault?.
Tell us about your Hyundai, the symptoms and any warning messages. OBD_PAL diagnoses the complete system before recommending any repair — don't guess, diagnose it properly.