B1126
B1126: Body Control Module (BCM) Security System Malfunction
📖 What Does B1126 Mean?
Symptoms
- • Alarm system failure
- • doors and trunk not locking/unlocking
- • remote start not functioning
Common Causes
- • Faulty BCM sensor
- • wiring damage
- • software glitch
- • faulty door or trunk lock actuator
Possible Solutions
1. Check BCM sensor connections and wiring for damage or corrosion. 2. Update BCM software if necessary. 3. Replace faulty BCM sensor or door/trunk lock actuator if damaged.
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❓ Common Questions About B1126
Can I drive with code B1126?
You can drive for a short time, but should address code B1126 soon to avoid worsening the problem or failing an emissions test.
How much does it cost to fix B1126?
The estimated repair cost for code B1126 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.
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View Best Sellers ↗Related Diagnostic Codes
Other codes that may appear with B1126
B1124: Seat Height Sensor Circuit Malfunction
B1125: Body Control Module (BCM) Malfunction - Lighting
B1127: Audio System Malfunction
B1128: Airbag 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