B2100

Door Driver Key Cylinder Switch Failure

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Incorrect operation of the central locking
Alarm problems
Immobilizer malfunction
Flashing safety light on the dashboard

Causes

Lock limit switch faulty
Open or shorted wiring harness
Oxidation of contacts
Mechanical damage to the lock

How to Fix

Check the operation of the limit switch with a multimeter
Inspect the wiring harness for damage
Clean contacts from oxidation
If necessary, replace the limit switch or the entire lock

Related codes

B2101 B2102 B2103