A failing or internally faulted steering effort control module; Corroded, loose, or damaged wiring and connectors at the steering effort module or along the CAN bus; Low or unstable battery voltage causing the module to drop offline intermittently; A software or calibration issue in the steering effort module requiring a reflash or relearn; CAN bus communication faults such as a shorted or open data line affecting multiple modules; A poor ground connection at the steering effort module or chassis grounding point; Aftermarket accessories or improper electrical repairs introducing noise or resistance on the network

DTC codes / U04xx · Invalid data received from a module / U0419

U0419Invalid Data Received From Steering Effort Control Module

Q: What does code U0419 mean?

Invalid Data Received From Steering Effort Control Module. U0419 means the vehicle's main computers received invalid or missing data from the steering effort control module over the controller area network (CAN) bus. The module that measures or controls steering effort is either reporting implausible values or has stopped communicating reliably, so other systems flag the data as untrustworthy.

U0419 means the vehicle's main computers received invalid or missing data from the steering effort control module over the controller area network (CAN) bus. The module that measures or controls steering effort is either reporting implausible values or has stopped communicating reliably, so other systems flag the data as untrustworthy.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaInvalid data received from a module

Symptoms you may notice

A steering warning light or stability control warning light illuminated on the dashboard
Heavier or inconsistent steering effort, especially at low speeds or during parking maneuvers
A message on the driver information display indicating a steering system fault or reduced assist
The vehicle entering a reduced-power or limp mode with limited steering assist
Often no symptoms besides the warning light, with steering feel completely normal
Other unrelated warning lights appearing because multiple modules share the same network

Common causes, most likely first

A failing or internally faulted steering effort control module
Corroded, loose, or damaged wiring and connectors at the steering effort module or along the CAN bus
Low or unstable battery voltage causing the module to drop offline intermittently
A software or calibration issue in the steering effort module requiring a reflash or relearn
CAN bus communication faults such as a shorted or open data line affecting multiple modules
A poor ground connection at the steering effort module or chassis grounding point
Aftermarket accessories or improper electrical repairs introducing noise or resistance on the network

How to diagnose and fix it

Perform a full scan of all modules and record every stored and pending code before clearing anything
Check battery voltage and charging system output, then load-test the battery to rule out low-voltage communication faults
Inspect the steering effort module connectors and harness for corrosion, pushed pins, chafing, and loose grounds
Measure CAN bus resistance and voltage at the diagnostic connector to confirm the network is healthy
Verify the steering effort module's power and ground circuits with a multimeter under load
Check for and install any available software updates or calibrations for the steering effort module
If wiring and power are good, substitute a known-good module or perform a module relearn before condemning the part

Why U0419 is often a voltage or wiring fault

A weak battery or failing alternator is a very common root cause because the steering effort module can drop offline during cranking or under load, setting U0419 without any steering complaint.
Technicians often replace the steering effort module only to find the real fault is a corroded connector or chafed harness near the steering rack or column.
U0419 can be set by a module that is communicating but sending implausible data, so a simple 'no communication' check is not enough; live data and plausibility checks matter.
Aftermarket electrical accessories tapped into the CAN bus or power circuits can introduce interference that corrupts steering effort data and triggers this code.
Clearing the code without checking freeze-frame data and module-specific codes can hide an intermittent fault that returns at the worst possible time.

Can I keep driving with U0419?

If the steering feels normal, you can drive cautiously to a repair shop, but avoid high-speed maneuvers and heavy steering loads. If steering assist is reduced or the wheel feels heavy, stop driving and have the vehicle towed because loss of steering assist can be dangerous.

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.