📖 What Does B2790 Mean?
Symptoms
- • Alarm system activation
- • door locks not functioning
- • or dashboard warning lights illuminated.
Common Causes
- • Faulty door ajar switch
- • malfunctioning alarm system
- • or a problem with the BCM's security communication protocol.
Possible Solutions
1. Check the door ajar switches for proper operation and clean or replace them if necessary. 2. Inspect the alarm system wiring and connections for damage or corrosion. 3. Update the BCM's software if necessary. 4. Replace the BCM if it's faulty.
Fixing this on your car?
Get a vehicle-specific repair guide with exact parts, oil specs, and torque settings for your make and model.
🚙 Get Vehicle-Specific Fix Guide
Select your vehicle to see a customized repair guide with exact parts and specifications:
❓ Common Questions About B2790
Can I drive with code B2790?
You can drive for a short time, but should address code B2790 soon to avoid worsening the problem or failing an emissions test.
How much does it cost to fix B2790?
The estimated repair cost for code B2790 is between $100 and $500. This includes parts and labor for most makes and models.
Is this code easy to fix myself?
This repair is considered moderate. It may require specialized tools or significant disassembly. Professional help is recommended if you aren't an experienced DIYer.
Required Parts
Recommended Tools
Need a Pro?
Complex codes like B2790 can be tricky. Don't risk it if you're unsure.
Recommended Tool
Professional OBD2 Scanner
Read & clear codes, view live data, and reset service lights yourself.
View Best Sellers ↗Related Diagnostic Codes
Other codes that may appear with B2790
B2788: Seat Switch Circuit Malfunction
B2789: Exterior Lighting Malfunction
B2791: Audio System Fault
B2792: Airbag System Fault
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system