B1165
B1165: Body Control Module (BCM) Lighting Circuit Malfunction
📖 What Does B1165 Mean?
Symptoms
- • Dim or inoperative exterior lights
- • faulty turn signal indicators
- • or intermittent lighting issues.
Common Causes
- • Faulty BCM
- • wiring harness damage
- • blown fuse
- • or a malfunctioning lighting module.
Possible Solutions
1. Check the BCM for any stored trouble codes and clear them. 2. Inspect the wiring harness for damage and repair or replace as needed. 3. Check the fuse box for blown fuses and replace them if necessary. 4. Test the lighting module and replace it if 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 B1165
Can I drive with code B1165?
You can drive for a short time, but should address code B1165 soon to avoid worsening the problem or failing an emissions test.
How much does it cost to fix B1165?
The estimated repair cost for code B1165 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 B1165 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 B1165
B1163: Power Window Relay Circuit Malfunction
B1164: Seat Position Sensor Circuit Malfunction
B1166: Body Control Module (BCM) Security System Malfunction
B1167: Audio System Malfunction
💡 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