U0561: Invalid Data Received From Seat Control Switch Module A

What it means

A receiving control module has detected invalid data from Seat Control Switch Module A. The code does not specify which data is invalid or why.

How it works

Seat Control Switch Module A sends seat-switch status or commands across the vehicle network. U0561 is recorded when another module receives data from this specific switch module but judges it invalid; it does not name the affected seat function.

Common causes

Most likely first.

1. Module internal fault or sensor input drift
2. Software version mismatch after replacement
3. Gateway module routing CAN messages incorrectly

Symptoms

• Multiple warning lights may illuminate
• Affected modules may go into limp mode or shut down
• Specific functions inoperative depending on module
• Diagnostic tools may show communication faults

How to diagnose it

1. Scan all modules and save freeze-frame and communication codes to see which module rejected Seat Control Switch Module A's data.
2. Check whether the seat switches or related seat functions behave abnormally and whether the code is current or stored from an earlier event.
3. Inspect Module A's switch panel connectors and under-seat or seat-mounted wiring, as equipped, for loose plugs, pin damage, or pinched harnesses.
4. Check the module's power, ground, and network connections using vehicle wiring information and the manufacturer's specification.
5. Review recent seat, battery, or module work and check gateway configuration or software compatibility.
6. If the wiring and configuration are sound, use vehicle-specific tests to evaluate the switches and Module A.

Common fixes

• Reconnect or clean a loose Seat Control Switch Module A connector.
• Repair pinched or damaged seat wiring and correct poor power or ground connections.
• Repair a faulty switch input if testing identifies one.
• Correct module configuration or install the correct software if mismatched.
• Repair or replace Module A if it fails vehicle-specific tests.

Can I keep driving?

The code usually affects seat controls rather than vehicle propulsion, but a seat that cannot be adjusted may leave the driver in an unsafe position. Set the seat securely before driving and avoid operating it while the vehicle is moving.