U0246: Lost Communication With Seat Control Module E

What it means

A control module has stopped receiving expected messages from seat control module E. The code identifies the communication loss; seat functions controlled by that module may be affected.

At a glance

• Usually lights the warning light of the system that lost communication

How it works

Seat control module E manages the seat functions assigned to the E module and exchanges commands and status with other modules over the vehicle network. U0246 sets when expected messages from module E stop arriving, so its controlled seat functions may be limited or unavailable.

Common causes

Most likely first.

1. Loss of power or ground to the module
2. Open, shorted, or damaged network wiring or connector
3. Failed module

Symptoms

• Seat functions controlled by the module may be unavailable or limited
• A warning may appear depending on the vehicle

How to diagnose it

1. Scan all modules for communication codes and review event data for other modules that lost contact at the same time.
2. Identify which seat functions assigned to module E are inoperative and check for a seat or system warning.
3. Inspect module E's connectors and wiring beneath or beside the seat for loose terminals, corrosion, pinching, or damage from seat movement.
4. Check the module's power and ground circuits according to the manufacturer's procedure.
5. Test the network wiring to seat control module E for opens, shorts, and poor connections while accounting for seat movement in the harness inspection.
6. If supplies and network wiring pass, use the manufacturer's diagnostics to determine whether module E has failed.

Common fixes

• Reconnect or clean a loose or corroded seat module E connector.
• Repair pinched or damaged wiring under the seat and secure it clear of moving seat tracks.
• Restore power or ground to seat control module E.
• Replace module E if circuit tests pass and diagnostics confirm an internal failure.

Can I keep driving?

Driving is generally possible if the seat is firmly latched in a safe position and the driver's seating position is secure. Do not drive if the seat can move unexpectedly or cannot be adjusted to a safe position.