TESLA Network

Tesla MCU Alert Codes

Media Control Unit reference page with 34 Tesla alert codes, 22 detailed descriptions, severity counts, and diagnostic context.

0
Critical
21
Warning
0
Caution
13
Info

What the MCU system covers

Media Control Unit alerts belong to Tesla's proprietary diagnostic alert system and are grouped under the network category.

Read all active alerts together instead of diagnosing a single code in isolation.
Check recent service, firmware updates, and low-voltage battery condition.
Use Tesla Service or a qualified EV technician for safety-critical systems.

Alert type breakdown

Warning 21 Unknown 13

Tesla MCU code list

Rows with a linked code have a dedicated detail page.

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Code Severity Type Description
MCU_u001
MCU_u001_rearSeatbeltUnbuckled
Info Unknown
MCU_u001 - rear Seatbelt Unbuckled

Tesla unknown code in the Media Control Unit (MCU) module. The media control unit (MCU) has detected that the seat belt is unbuckled.

MCU_u002
MCU_u002_washerFluidLow
Info Unknown
MCU_u002 - washer Fluid Low

Tesla unknown code in the Media Control Unit (MCU) module. This alert indicates the media control unit (MCU) has detected that the washer fluid level in the windshield washer system is low.

MCU_u003
MCU_u003_HeadlightsOnDoorOpen
Info Unknown
MCU_u003 - Headlights On Door Open

Tesla unknown code in the Media Control Unit (MCU) module. The headlights are on and a vehicle door is open.

MCU_u004
MCU_u004_EASInJackMode
Info Unknown
MCU_u004 - EAS In Jack Mode

Tesla unknown code in the Media Control Unit (MCU) module related to eas in jack mode.

MCU_u005
MCU_u005_FrunkOpen
Info Unknown
MCU_u005 - Frunk Open

Tesla unknown code in the Media Control Unit (MCU) module. The media control unit (MCU) has detected that the frunk / front trunk is open.

MCU_u006
MCU_u006_DriverDoorOpen
Info Unknown
MCU_u006 - Driver Door Open

Tesla unknown code in the Media Control Unit (MCU) module. The media control unit (MCU) has detected that the driver door is open.

MCU_u007
MCU_u007_DoorOpen
Info Unknown
MCU_u007 - Door Open

Tesla unknown code in the Media Control Unit (MCU) module. The media control unit (MCU) has detected that a door is open. This alert is applicable to the passenger front door and both rear doors. It does not apply to the frunk or liftgate.

MCU_u008
MCU_u008_DSTEntryLockDisabled
Info Unknown
MCU_u008 - DST Entry Lock Disabled

Tesla unknown code in the Media Control Unit (MCU) module. The dead key entry / start feature has been used (usually because the key fob battery is too low). If this alert is present, passive lock is disabled and this alert appears to indicate that the feature will not work.

MCU_u014
MCU_u014_TrunkOpen
Info Unknown
MCU_u014 - Trunk Open

Tesla unknown code in the Media Control Unit (MCU) module related to trunk open.

MCU_u015
MCU_u015_notOnPrivateProperty
Info Unknown
MCU_u015 - not On Private Property

Tesla unknown code in the Media Control Unit (MCU) module related to not on private property.

MCU_u016
MCU_u016_FalconDoorOpen
Info Unknown
MCU_u016 - Falcon Door Open

Tesla unknown code in the Media Control Unit (MCU) module related to falcon door open.

MCU_u017
MCU_u017_RegenChanged
Info Unknown
MCU_u017 - Regen Changed

Tesla unknown code in the Media Control Unit (MCU) module. Regen has been improved (increased) for the dual motor Model S refresh vehicles. This alert will be shown 3 times for existing user profiles with Regen set to Standard.?

MCU_u018
MCU_u018_ApTrialExpired
Info Unknown
MCU_u018 - Ap Trial Expired

Tesla unknown code in the Media Control Unit (MCU) module related to ap trial expired.

MCU_w004
MCU_w004_TouchScreenError
Warning Warning
MCU_w004 - Touch Screen Error

Tesla warning code in the Media Control Unit (MCU) module related to touch screen error.

MCU_w005
MCU_w005_BrakeFluidLow
Warning Warning
MCU_w005 - Brake Fluid Low

Tesla warning code in the Media Control Unit (MCU) module. The brake fluid levels have dropped below acceptable levels.

MCU_w006
MCU_w006_displayFirmwareMismatch
Warning Warning
MCU_w006 - display Firmware Mismatch

Tesla warning code in the Media Control Unit (MCU) module related to display firmware mismatch.

MCU_w007
MCU_w007_MapsMissing
Warning Warning
MCU_w007 - Maps Missing

Tesla warning code in the Media Control Unit (MCU) module. The media control unit (MCU) has detected that the maps are missing.

MCU_w008
MCU_w008_TPMS_globalHardWarn
Warning Warning
MCU_w008 - TPMS global Hard Warn

Tesla warning code in the Media Control Unit (MCU) module. This alert indicates that the measured tire pressure is below the hard threshold value (25 psi for most markets and configurations). It does not indicate a system malfunction and should not be confused with MCU_w012_TPMS_systemFault.

MCU_w009
MCU_w009_TPMS_globalOverPresWarn
Warning Warning
MCU_w009 - TPMS global Over Pres Warn

Tesla warning code in the Media Control Unit (MCU) module. This alert indicates that the tire pressure monitoring system (TPMS) electronic control unit (ECU) has detected a tire pressure that is above its maximum allowable pressure of 58 psi.

MCU_w010
MCU_w010_TPMS_globalSoftWarn
Warning Warning
MCU_w010 - TPMS global Soft Warn

Tesla warning code in the Media Control Unit (MCU) module. This alert indicates that the measured tire pressure is below the soft threshold value (usually about 4 psi below the recommended cold pressure). It does not indicate a system malfunction and should not be confused with MCU_w012_TPMS_systemFault.

MCU_w012
MCU_w012_TPMS_systemFault
Warning Warning
MCU_w012 - TPMS system Fault

Tesla warning code in the Media Control Unit (MCU) module. This alert indicates that the tire pressure monitor system (TPMS) electronic control unit (ECU) cannot read one of the sensors or has detected that there is an issue internal to the ECU. If this alert is present, a sensor signal may have dropped out, but the alert only indicates that the ECU is in a fault state and cannot reliably report tire pressures or produce the appropriate pressure-related warnings.

MCU_w013
MCU_w013_IncorrectMap
Warning Warning
MCU_w013 - Incorrect Map

Tesla warning code in the Media Control Unit (MCU) module. This alert indicates the installed maps do not match the configured region.

MCU_w016
MCU_w016_wifiAntennaDisconnected
Warning Warning
MCU_w016 - wifi Antenna Disconnected

Tesla warning code in the Media Control Unit (MCU) module. The WiFi antenna may be disconnected.

MCU_w018
MCU_w018_sunroofSpeedWarning
Warning Warning
MCU_w018 - sunroof Speed Warning

Tesla warning code in the Media Control Unit (MCU) module related to sunroof speed warning.

MCU_w027
MCU_w027_dtcActive
Warning Warning
MCU_w027 - dtc Active

Tesla warning code in the Media Control Unit (MCU) module. This is a generic customer facing DTC alert that indicates that a DTC is set.

MCU_w028
MCU_w028_usb5vProblem
Warning Warning
MCU_w028 - usb5v Problem

Tesla warning code in the Media Control Unit (MCU) module. USB 5V does not come up after wake.

MCU_w029
MCU_w029_remoteServiceAlert
Warning Warning
MCU_w029 - remote Service Alert

Tesla warning code in the Media Control Unit (MCU) module. This alert is set by Service Engineering to notify the customer that they should contact their Service Center for certain actions. The reasons for why this alert is set can be highly variable as there is no single cause. This alert is only triggered on vehicles that have provided Tesla diagnostic related information pointing to a condition uniquely present to each respective vehicle that may require repair.

MCU_w030
MCU_w030_softPackConfigMismatch
Warning Warning
MCU_w030 - soft Pack Config Mismatch

Tesla warning code in the Media Control Unit (MCU) module. This alert indicates that the configuration for the maximum state of charge (SOC) termination does not match the pack installed on the vehicle.

MCU_w034
MCU_w034_apeFusesEtc
Warning Warning
MCU_w034 - ape Fuses Etc

Tesla warning code in the Media Control Unit (MCU) module. This alert indicates that an incompletely fused driver's assistance (DAS) electronic control unit (ECU) is installed in the car. Factory-gated cars must have a fully-fused DAS ECU installed. Note: Do not replace hardware for this alert unless you have confirmed via escalation.

MCU_w055
MCU_w055_CellRoamingDisallowed
Warning Warning
MCU_w055 - Cell Roaming Disallowed

Tesla warning code in the Media Control Unit (MCU) module. The vehicle no longer has cell data access.

MCU_w056
MCU_w056_BrakeShiftRequired
Warning Warning
MCU_w056 - Brake Shift Required

Tesla warning code in the Media Control Unit (MCU) module related to brake shift required.

MCU_w057
MCU_w057_BackupCameraIPUTimeout
Warning Warning
MCU_w057 - Backup Camera IPU Timeout

Tesla warning code in the Media Control Unit (MCU) module related to backup camera ipu timeout.

MCU_w058
MCU_w058_BackupCameraFrameTimeout
Warning Warning
MCU_w058 - Backup Camera Frame Timeout

Tesla warning code in the Media Control Unit (MCU) module related to backup camera frame timeout.

MCU_w065
MCU_w065_BackupCameraInitError
Warning Warning
MCU_w065 - Backup Camera Init Error

Tesla warning code in the Media Control Unit (MCU) module related to backup camera init error.