Starter Interrupt Relay Circuit
The B0544 code means the vehicle's onboard diagnostic system has detected: Starter Interrupt Relay Circuit. This is a critical severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- hard
- Estimated cost
- $100 - $600 (parts and labor)
Basic scanners skip body codes entirely. BlueDriver reads airbag, HVAC, lighting, and BCM codes through your phone.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Common Symptoms
- Vehicle will not start
- Anti-theft indicator flashing rapidly
- Engine cranks but does not run
- Security light on dashboard
Probable Causes (Ranked by Likelihood)
- Faulty immobilizer antenna ring Very High
- Damaged key transponder High
- Immobilizer control module failure Moderate
- Key not programmed correctly Low
Step-by-Step Diagnostic Procedure
-
Scan theft deterrent module for codes
-
Check alarm sensor connections
-
Test alarm trigger inputs
-
Verify alarm module power and ground
Frequently Asked Questions
Why does my alarm go off randomly?
Common causes include a weak battery, faulty hood or trunk switch, or oversensitive motion/tilt sensors.
Can a low battery trigger the alarm?
Yes, low voltage can cause alarm module malfunctions and false triggers.
How do I reset the alarm system?
Try locking and unlocking with the key fob, disconnecting the battery for 30 seconds, or using a scan tool to reset the module.
Sources
This page is built from documented references. Verify against your own service info before repair work.
Explore More
Was this helpful?
Share carcodefinder.com with a friend who needs to decode their check engine light.