← View Generic B1821 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2014 Nissan SENTRA
B1821: B1821: Turn Signal Lamp Malfunction
on 2014 Nissan SENTRA
Fix Cost
$50 - $200
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
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 B1821 Mean on 2014 Nissan SENTRA?
The B1821 code indicates a malfunction in the turn signal lamp circuit, which can cause the turn signals to malfunction or not function at all.
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Symptoms
- • Turn signals not working
- • flashing
- • or staying on continuously
- • warning lights on dashboard
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Common Causes
- • Faulty turn signal switch
- • corroded or damaged wiring
- • blown fuse
- • or malfunctioning turn signal lamp
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How to Fix B1821 on 2014 Nissan SENTRA
1. Check and replace the turn signal switch if faulty. 2. Inspect and clean or replace corroded wiring. 3. Check and replace the fuse if blown. 4. Replace the turn signal lamp if malfunctioning.
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Need Maintenance Info for Your SENTRA?
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Related Diagnostic Codes
Other codes that may appear with B1821
B1819
Sequential Code
B1819: Power Window Relay Circuit Malfunction
Medium
B1820
Sequential Code
B1820: Seat Position Sensor Circuit Malfunction
Medium
B1822
Sequential Code
B1822: Immobilizer System Malfunction
Medium
B1823
Sequential Code
B1823: 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