B302A

Mobile Telephone Communications Interface Requested Immobilization

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Inability to activate remote control functions
Immobilizer error message on dashboard
Intermittent problems starting the engine

Causes

Broken or corroded telephone interface wiring harness
Immobilizer module malfunction
Software failure in the head unit
Problems with power or grounding of the circuit

How to Fix

Check the integrity of the wiring harness between the modules
Diagnose power and mass in the circuit
Scan for software errors in paired modules
Reflash or replace the faulty module if necessary

Related codes

B302B U0155 U0164