B3849

Left Front/Driver Exterior Door Handle Switch Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Driver's side keyless entry does not work
Problems opening the driver's door
Central locking faults
The hazard warning light flashes when you try to open the door

Causes

Open or short circuit in the switch circuit
Malfunction of the handle switch itself
Damage to the wiring harness in the door
Contact corrosion
Control unit error

How to Fix

Check the condition of the door handle switch
Inspect the wiring harness for damage
Check contacts for oxidation
Replace the faulty switch
Reflash the control unit if necessary

Related codes

B3850 B3851 B3852