OBD-II Standard B0919: OBD-II Standard OBD-II Universal E...

Symptoms

The engine may not start. The immobilizer system has a fault preventing engine start authorization. DTC B0919 is stored in the body control module.

Possible Causes

Immobilizer key transponder not recognized
Immobilizer antenna ring fault
Immobilizer module communication fault with ECM
Key not enrolled in system after replacement

Troubleshooting Steps

Step 1: Connect a diagnostic scanner and read body DTCs to confirm B0919
DTC B0919 is present with freeze frame data
Step 2: Inspect wiring and connectors in the affected circuit
Wiring intact, connectors clean and properly seated
Step 3: Perform component-level testing per manufacturer diagnostic procedure
Component values within specification or component confirmed faulty
Step 4: Clear the DTC and verify it does not return
DTC does not return after system self-test

How to Reset

Clear the DTC after repair using a diagnostic scanner. The code will clear automatically if the fault is no longer detected after 3 consecutive drive cycles.

Common Replacement Parts

varies: Immobilizer antenna ring (around ignition) (Confirm part number via VIN before ordering)

Frequently Asked Questions

Q: What does code B0919 mean?
This is a body-related diagnostic trouble code indicating an issue with the body system. The specific component should be diagnosed per the manufacturer's procedure.
Q: Is code B0919 safe to ignore?
If the code relates to the airbag system (SRS), it is NOT safe to ignore as airbags may not deploy in a crash. For other body systems, the vehicle can typically be driven but the affected feature may not work.

OBD-II Standard OBD-II Universal Error Code B0919