HomeTrouble CodesU0548

U0548 — Invalid Data Received From Seat Control Module F

Generic OBD-II · all makesNetwork / communication

The vehicle detected corrupted or out-of-range data coming from the seat control module F on the CAN network. This typically disables power-seat functions and may illuminate a warning light.

Symptoms

What causes it — most likely first

1. Faulty seat control module F

The module may have internal failure that transmits incorrect data frames.

2. Wiring or connector problem to module F

Corroded, loose, or damaged wires/connector pins can cause data errors on the CAN bus.

3. Communication error from another body control module

A nearby module (e.g., body control or gateway) may be sending malformed messages that the seat module receives.

4. CAN bus network integrity issue

Voltage spikes, ground problems, or bus contention on the network can corrupt data frames.

5. Powertrain control module (PCM) communication fault

Only if the PCM is directly involved in the seat network, which is rare; usually indicates a broader network problem.

How it's diagnosed

  1. Verify that no additional U- or B-codes are present and record all freeze-frame data.
  2. Inspect the connector and wiring harness for seat control module F for corrosion, damage, or loose pins.
  3. Measure CAN-H and CAN-L voltages for proper voltage levels and look for abnormal spikes.
  4. Perform a pin-to-pin resistance and continuity test on the CAN bus wiring between modules.
  5. Use a scan tool to command seat functions and observe live data to confirm if module F responds correctly.
  6. If wiring and voltages are normal, replace the seat control module F as the most likely fix.

Code facts & related codes

SystemNetwork / communication
StandardizationSAE generic — identical on every make

Frequently asked

What does U0548 mean?

It indicates that a control module on the vehicle network received invalid data from the seat control module F.

Can I still drive the car with this code?

Yes, the code usually only disables seat-adjustment features; the vehicle can be driven safely.

Do I need to replace the PCM?

No, replacing the PCM is rarely necessary; the issue is usually with the seat module, wiring, or network.

Will fixing the wiring solve the problem?

Often, repairing a loose or corroded connector resolves the invalid data condition without replacing any modules.