U024B: Lost Communication With Seat Control Module G

What it means

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

How it works

Seat control module G operates the seat functions assigned to it and sends status messages over the vehicle network. This code sets when another control module no longer receives the expected messages from module G; it does not by itself identify which seat function or network component failed.

Common causes

Most likely first.

1. Bus wiring open or shorted
2. Module without power or ground
3. Module failed

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 and save the freeze-frame and communication details to see which module recorded U024B and whether other network codes appeared at the same time.
2. Try the seat functions associated with module G and note which are unavailable or limited, without assuming the code identifies a particular seat or adjustment.
3. Inspect module G's connectors and nearby bus wiring for loose plugs, corrosion, pin damage, or harness damage.
4. Check module G's power and ground connections under the conditions specified by the manufacturer, since loss of either can silence the module.
5. Test the network wiring to module G for opens or shorts using the manufacturer's procedure and wiring information.
6. If wiring, power, and ground are correct, follow the manufacturer's communication checks before considering module G faulty.

Common fixes

• Reconnect and secure a loose module G connector.
• Repair damaged or corroded network wiring or connector pins to module G.
• Restore a failed power feed or ground to module G.
• Replace module G only after its supply, ground, and network connections test correctly.

Can I keep driving?

The code does not indicate an engine or emissions fault, but seat functions controlled by module G may be unavailable. Avoid relying on an affected adjustment to position or secure the seat for driving; have the fault checked if the seat cannot be set safely.