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DTC codes / U05xx · Network communication / U0561

U0561Invalid Data Received From Seat Control Switch Module A

U0561 means the module that monitors the vehicle's communication network received invalid or missing data from the seat control switch module A, which is the module that reads the seat adjustment switches. The computer detected a fault in the data stream from that module, not necessarily a failure of the seat motor or wiring itself.

SystemNetwork
Code typeGeneric (all makes)
SeverityLow
Fix difficultyIntermediate
AreaNetwork communication

Symptoms you may notice

  • The seat may not move in one or more directions, or may move erratically.
  • The seat memory function may not work or may recall the wrong position.
  • A warning light on the dash, often the supplemental restraint system (SRS) light if the seat position affects airbag deployment.
  • The seat heater or ventilation may not operate if those functions are integrated into the switch module.
  • Often no symptoms besides the warning light, especially if the fault is intermittent.

Common causes, most likely first

  1. A faulty seat control switch module A, including internal electronics or water damage.
  2. Corroded, loose, or damaged electrical connectors at the seat control switch module.
  3. A shorted or open wire in the controller area network (CAN) bus or other communication circuit between the seat module and the module that set the code.
  4. Low battery voltage or a weak battery causing modules to drop offline intermittently.
  5. A software glitch or lost configuration in the seat control switch module.
  6. Aftermarket accessories or improper installation of seat covers or electronics interfering with the module.
  7. A faulty body control module (BCM) or gateway module that is misreporting data from the seat module.

How to diagnose and fix it

  1. Verify battery voltage and charge the battery if it is low, then clear the code and retest to see if it returns.
  2. Inspect the seat control switch module connectors for corrosion, loose pins, or water intrusion, and clean or repair as needed.
  3. Check the communication bus wiring between the seat module and the module that set the code for shorts to ground, shorts to power, or opens.
  4. Use a scan tool to perform a bidirectional test of the seat control switch module to confirm it responds and reports switch positions correctly.
  5. If the module is unresponsive or reports invalid data, check for technical service bulletins (TSBs) or software updates for the seat control switch module.
  6. Substitute a known-good seat control switch module of the same part number to see if the code clears and functions return.
  7. If the fault persists after module replacement, diagnose the body control module or gateway for internal faults affecting data translation.

What the seat switch module code hides

  • A U0561 code often sets because the seat control switch module lost power or ground momentarily, not because the module itself failed, so always check fuses and grounds first.
  • Water intrusion from a spilled drink or a leaking sunroof drain can corrode the seat module connectors and cause invalid data without any visible seat malfunction.
  • The code can be set by a completely different module on the network that is corrupting the bus, so a full system scan for other U-codes is essential before replacing the seat module.
  • After replacing a seat control switch module, some vehicles require configuration or initialization with a scan tool, otherwise the new module may still report invalid data.
  • Intermittent U0561 codes that appear only in cold or damp weather often point to a wiring harness chafe under the seat where the harness flexes with seat movement.

Can I keep driving with U0561?

You can generally continue driving with U0561 because the seat adjustment function is not safety-critical, but if the seat position affects airbag deployment or the seat is stuck in an unsafe position, have it repaired promptly. Avoid adjusting the seat repeatedly until the fault is diagnosed to prevent further module or wiring damage.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

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

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