B0749
B0749: Body Control Module (BCM) - Exterior Lighting Circuit Malfunction
📖 What Does B0749 Mean?
Symptoms
- • Dim or inoperative exterior lights
- • faulty headlight or taillight operation
- • or warning lights on the dashboard.
Common Causes
- • Faulty BCM
- • wiring issues
- • blown fuses
- • or damaged exterior lights.
Possible Solutions
1. Check the BCM fuse and replace if blown. 2. Inspect and repair or replace wiring as needed. 3. Test and replace faulty exterior lights. 4. Update BCM software if necessary.
Fixing this on your car?
Get the exact oil type, fluid capacities, and torque specs for your specific vehicle before you start the repair.
❓ Common Questions About B0749
Can I drive with code B0749?
You can drive for a short time, but should address code B0749 soon to avoid worsening the problem or failing an emissions test.
How much does it cost to fix B0749?
The estimated repair cost for code B0749 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
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Other codes that may appear with B0749
B0747: Power Window Regulator Malfunction
B0748: Power Seat Actuator Circuit Malfunction
B0750: Immobilizer System Malfunction
B0751: Audio 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