U0509

Invalid Data Received From Seat Control Module A

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Seat adjustment functions do not work
Check Engine or SRS light is on
The seat does not remember the position
Intermittent operation of heated seats
Errors in other comfort systems

Causes

Seat control module A malfunction
Open or short circuit in wiring harness
Poor contact in connectors under the seat
Module power problems
Software error in the control unit

How to Fix

Check the integrity of the wiring harness under the seat
Inspect and clean the connector contacts
Check the power and ground of the control module
Scan the seat module for errors
Replace the seat control module if necessary
Repair only from an authorized dealer

Related codes

U0501 U0502 U0510