← View Generic B0749 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2014 Nissan SENTRA
B0749: B0749: Body Control Module (BCM) - Exterior Lighting Circuit Malfunction
on 2014 Nissan SENTRA
Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2014 Nissan
SENTRA
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Important for 2014 Nissan SENTRA Owners
Before starting repairs, verify which engine your 2014 Nissan SENTRA has. Check your VIN or engine code to ensure you order the correct parts.
📖 What Does B0749 Mean on 2014 Nissan SENTRA?
The Body Control Module (BCM) has detected a malfunction in the exterior lighting circuit, which may cause issues with the vehicle's headlights, taillights, or other exterior lights.
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Symptoms
- • Dim or inoperative exterior lights
- • faulty headlight or taillight operation
- • or warning lights on the dashboard.
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Common Causes
- • Faulty BCM
- • wiring issues
- • blown fuses
- • or damaged exterior lights.
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How to Fix B0749 on 2014 Nissan SENTRA
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.
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Need Maintenance Info for Your SENTRA?
Get oil capacity, filter specs, and torque settings for your specific 2014 Nissan SENTRA.
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Essential Tool
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Related Diagnostic Codes
Other codes that may appear with B0749
B0747
Sequential Code
B0747: Power Window Regulator Malfunction
Medium
B0748
Sequential Code
B0748: Power Seat Actuator Circuit Malfunction
Medium
B0750
Sequential Code
B0750: Immobilizer System Malfunction
Medium
B0751
Sequential Code
B0751: Audio System Fault
Medium
💡 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