Corroded, loose, or damaged wiring and connectors in the controller area network (CAN) bus between the automated driving interface module and its consumers; Low or unstable battery voltage causing the interface module to transmit corrupted frames during startup or under load; A software or calibration mismatch in the automated driving interface module after a battery replacement or module replacement; A failing automated driving interface module that intermittently drops off the bus or sends out-of-range data; A faulty sensor feeding the interface module, such as a camera or radar unit, causing it to relay implausible values; Water intrusion or poor grounding at the interface module connector, common when the module is mounted low in the cabin or behind a trim panel; A separate module on the same bus transmitting errors that disrupt communication with the interface module

DTC codes / U04xx · Invalid data received from a module / U045F

U045FInvalid Data Received From Automated Driving System Interface Module A

U045F is a communication fault where the module that coordinates automated driving features, such as adaptive cruise control and lane keeping, sends data that the receiving module judges invalid or out of range. The computer detected a message from the Automated Driving System Interface Module A that failed its plausibility or checksum validation, so it flagged the data as untrustworthy rather than treating it as a normal signal.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaInvalid data received from a module

Symptoms you may notice

Warning light or message for the automated driving system, adaptive cruise control, or lane keeping assist
Adaptive cruise control or lane centering drops out or refuses to engage
Forward collision warning or automatic emergency braking becomes unavailable
A chime or cluster message stating that driver assist features are temporarily disabled
Often no symptoms besides the warning light, with the vehicle driving normally in manual mode
Intermittent operation of driver assist features that return after a key cycle

Common causes, most likely first

Corroded, loose, or damaged wiring and connectors in the controller area network (CAN) bus between the automated driving interface module and its consumers
Low or unstable battery voltage causing the interface module to transmit corrupted frames during startup or under load
A software or calibration mismatch in the automated driving interface module after a battery replacement or module replacement
A failing automated driving interface module that intermittently drops off the bus or sends out-of-range data
A faulty sensor feeding the interface module, such as a camera or radar unit, causing it to relay implausible values
Water intrusion or poor grounding at the interface module connector, common when the module is mounted low in the cabin or behind a trim panel
A separate module on the same bus transmitting errors that disrupt communication with the interface module

How to diagnose and fix it

Scan all modules for stored and pending codes, and record the full freeze-frame data for U045F before clearing anything
Check battery voltage and charging system output, then load-test the battery because low voltage is a frequent cause of invalid data frames
Inspect the automated driving interface module connectors and the CAN bus wiring for corrosion, pin drag, chafing, and water intrusion
Verify the interface module is running the latest software and calibration, and reprogram it if a manufacturer update applies
Perform a wiggle test on the harness while watching live data for the interface module to catch intermittent connection faults
Substitute a known-good interface module or sensor only after wiring and power checks pass, then relearn or calibrate as required
Clear codes, complete a road test that activates the driver assist features, and confirm U045F does not return

Why invalid data is not always a bad module

A weak battery or a poor ground can corrupt CAN frames and set U045F without any fault in the interface module itself, so power and ground checks come before parts replacement.
The code points to invalid data rather than a missing message, which means the module is communicating but sending values the receiver rejects, often from a sensor feeding it bad input.
After a module replacement or software flash, a missing calibration or incomplete initialization can trigger U045F until the learn procedure is finished.
A camera or radar sensor that is misaligned or obstructed by dirt, snow, or a cracked lens can cause the interface module to relay implausible data and set this code.
Technicians who replace the interface module first often find the code returns because the real fault is a chafed CAN wire or a failing sensor on the same bus.

Can I keep driving with U045F?

The vehicle remains safe to drive in manual mode because the fault affects driver assist features rather than steering, braking, or throttle control. Avoid relying on adaptive cruise control or lane keeping until the fault is repaired, and address the code promptly if the warning is accompanied by any loss of power steering assist or braking performance.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.