Tesla MCU Alert Codes
Media Control Unit reference page with 34 Tesla alert codes, 22 detailed descriptions, severity counts, and diagnostic context.
What the MCU system covers
Media Control Unit alerts belong to Tesla's proprietary diagnostic alert system and are grouped under the network category.
Alert type breakdown
Tesla MCU code list
Rows with a linked code have a dedicated detail page.
| 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. |