A weak or failing battery or poor ground connection causing the convenience module to send corrupted data.; Corroded, loose, or damaged wiring and connectors on the controller area network (CAN) bus or local interconnect network (LIN) bus serving the module.; A software or calibration issue in the convenience module or a receiving module that misinterprets valid data.; A failing convenience recall module itself, often due to internal circuit faults or water intrusion.; Another module on the same network flooding the bus with errors and disrupting communication.; Aftermarket accessories tapped into the body wiring, such as alarms or remote starters, introducing interference.

DTC codes / U05xx · Network communication / U0535

U0535Invalid Data Received From Convenience Recall Module

Q: What does code U0535 mean?

Invalid Data Received From Convenience Recall Module. U0535 is a communication fault where the module that coordinates convenience features (often called the Convenience Recall Module or a body control module handling those functions) sends data that other modules on the network consider invalid. The computer detected a message from that module that was missing expected parameters, out of range, or otherwise corrupted, so it flagged the data as unusable rather than acting on it.

U0535 is a communication fault where the module that coordinates convenience features (often called the Convenience Recall Module or a body control module handling those functions) sends data that other modules on the network consider invalid. The computer detected a message from that module that was missing expected parameters, out of range, or otherwise corrupted, so it flagged the data as unusable rather than acting on it.

SystemNetwork

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaNetwork communication

Symptoms you may notice

Often no symptoms besides the warning light, because the invalid data may only affect non-critical convenience features.
Memory seats, mirrors, or steering column no longer return to their saved positions.
Remote start, keyless entry, or welcome lighting behaves erratically or stops working.
The infotainment or driver information center shows a communication or service message.
Multiple unrelated body features act up at the same time, suggesting a shared network issue.
Intermittent operation of convenience features that comes and goes with temperature or vibration.

Common causes, most likely first

A weak or failing battery or poor ground connection causing the convenience module to send corrupted data.
Corroded, loose, or damaged wiring and connectors on the controller area network (CAN) bus or local interconnect network (LIN) bus serving the module.
A software or calibration issue in the convenience module or a receiving module that misinterprets valid data.
A failing convenience recall module itself, often due to internal circuit faults or water intrusion.
Another module on the same network flooding the bus with errors and disrupting communication.
Aftermarket accessories tapped into the body wiring, such as alarms or remote starters, introducing interference.

How to diagnose and fix it

Scan all modules for stored codes and record freeze-frame data to see which module reported the invalid data and when.
Test the battery state of charge and perform a voltage drop test on grounds and power feeds to the convenience module.
Inspect and wiggle-test the connectors and wiring at the convenience module and along the network bus for corrosion or chafing.
Check for technical service bulletins or software updates for the convenience module and body control module before replacing parts.
Use a scan tool to monitor live data from the convenience module and confirm whether the invalid data is constant or intermittent.
If wiring and power are good, substitute a known-good module or perform a module relearn and recheck the code.
Clear codes after repair and verify the fault does not return during a road test with all convenience features exercised.

Why the convenience module gets blamed unfairly

A low battery or failing alternator is a common hidden cause because modules that see low voltage can transmit malformed data frames that other modules reject as invalid.
The code points to invalid data, not a dead module, so a module that communicates fine but sends out-of-range values will set this code without any no-communication symptom.
Aftermarket remote starters and alarm systems spliced into the convenience wiring frequently corrupt bus messages and set U0535 even though the factory module is healthy.
A single chafed wire on the network bus can affect several modules at once, so technicians who replace the convenience module first often see the code return.
This code can be stored alongside unrelated body codes simply because the convenience module shares a network segment with those systems, which can mislead diagnosis toward the wrong component.

Can I keep driving with U0535?

The vehicle is generally safe to drive because the fault affects convenience features rather than steering, braking, or airbags, but avoid relying on memory seats, remote start, or other affected features until repaired. If the warning light is accompanied by drivability symptoms or multiple module failures, have the electrical system checked promptly.

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.