AutoCodesGeneric – B1605

B1605 Code - Lamp Anti-Theft Indicator Circuit Short To Battery

Quick Answer

The Body Control Module (BCM) monitors the Lamp Anti-Theft Indicator. Common causes include Faulty Lamp Anti-Theft Indicator, Lamp Anti-Theft Indicator harness is open or shorted, Lamp Anti-Theft Indicator circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B1605 indicates Lamp Anti-Theft Indicator Circuit Short To Battery.
Common causes
Common causes include Faulty Lamp Anti-Theft Indicator, Lamp Anti-Theft Indicator harness is open or shorted, Lamp Anti-Theft Indicator circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 9,615
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 02, 2019
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Code B1605 Description

The Body Control Module (BCM) monitors the Lamp Anti-Theft Indicator. The BCM sets the OBDII code when the Lamp Anti-Theft Indicator is not to factory specifications.
OBDII Code B1605 - Lamp Anti-Theft Indicator Circuit Short To Battery - AutoCodes.com
B1605 Code - Lamp Anti-Theft Indicator Circuit Short To Battery

What are the Possible Causes of the DTC B1605?

  • Faulty Lamp Anti-Theft Indicator
  • Lamp Anti-Theft Indicator harness is open or shorted
  • Lamp Anti-Theft Indicator circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How to Fix the DTC B1605?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1605 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1605 code?

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Need Help with the Code?

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Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1605 Code

1. What does OBDII code B1605 mean?

Code B1605 indicates a short circuit in the lamp anti-theft indicator circuit, causing it to connect directly to the battery.

2. What are the common symptoms of code B1605?

Symptoms include the anti-theft indicator light staying on constantly, flickering, or not functioning at all, as well as potential issues with the vehicle's security system.

3. What causes code B1605?

The code is typically caused by damaged wiring, a short circuit, or a faulty anti-theft indicator module.

4. How is code B1605 diagnosed?

A technician will inspect the wiring for damage, check for shorts or corrosion, and test the anti-theft indicator module for functionality.

5. Can I drive with code B1605 active?

While the vehicle may still be drivable, the security system may not function properly, leaving the vehicle vulnerable to theft.

6. How can I fix code B1605?

Repairs may include replacing damaged wiring, repairing shorts, or replacing the anti-theft indicator module.

7. Is code B1605 related to other anti-theft system issues?

Yes, this code may be part of broader problems with the vehicle’s security system and should be addressed promptly.

8. How much does it cost to repair code B1605?

Repair costs vary depending on the extent of wiring damage and whether the anti-theft indicator module needs replacement, typically ranging from $100 to $500.

9. Can code B1605 trigger other error codes?

Yes, if the short circuit affects other components in the security system, additional codes may be triggered.

10. What tools are needed to diagnose code B1605?

A multimeter, wiring diagrams, and an OBDII scanner are typically used to diagnose this code.

Discuss the causes and fixes for B1605 OBDII Code

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