What it means
A control module has stopped receiving expected messages from seat control switch module A. The code identifies the communication loss; seat controls routed through that module may be affected.
How it works
Seat control switch module A sends requests from its switches to the vehicle network or seat-control system. U0260 sets when another module no longer receives the expected messages from module A, so controls routed through that specific switch module may stop responding even if the seat motor circuits are intact.
Common causes
Most likely first.
- Bus wiring open or shorted
- Module without power or ground
- Module failed
Symptoms
- Seat controls routed through the module may be unavailable or limited
- A warning may appear depending on the vehicle
How to diagnose it
- Scan all modules and note whether U0260 is current, when it set, and whether other network or low-voltage codes are present.
- Check which seat switches have stopped working and identify the controls routed through seat control switch module A on this vehicle.
- Inspect module A's connector and nearby wiring for a loose fit, spilled liquid, corrosion, pin damage, or pinched wires.
- Check the module's power and ground according to the manufacturer's wiring information, especially if the switch assembly is completely unresponsive.
- If its supplies are correct, test the bus wiring to module A for opens or shorts before condemning the switch module.
Common fixes
- Reconnect or clean a poor connection at seat control switch module A.
- Repair damaged wiring to the module.
- Restore a failed power or ground feed.
- Replace and configure module A if it remains offline with sound power, ground, and bus circuits.
Can I keep driving?
This code usually affects seat controls rather than basic vehicle operation. Do not adjust the seat while driving; set a safe driving position before moving, and address it promptly if the seat cannot be secured or positioned safely.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.