U01B7

Lost Communication With Switch Input Module A

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Some switches in the cabin do not work
Check Engine Light Is On
Malfunctions of the car's electronic systems
Other related trouble codes appear

Causes

Switch module A fault
Open or short circuit in the communication circuit
Poor contact in module connectors
Module power problems
CAN network fault

How to Fix

Check the integrity of the wiring harness to the module
Inspect the module connectors for oxidation or damage.
Check the power supply and ground of the module
Scan the CAN network for errors
Replace switch module if necessary

Related codes

U01B6 U01B8 U0121