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Engine-Codes – Generic – B1847

B1847 Code - Ignition Tamper Circuit Short To Battery

Quick Answer

The diagnostic trouble code B1847 indicates an issue with the ignition tamper circuit being shorted to the battery. Common causes include Damaged wiring or connectors in the ignition tamper circuit, Faulty ignition switch, Short circuit in the system. 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
B1847 indicates Ignition Tamper Circuit Short To Battery.
Common causes
Common causes include Damaged wiring or connectors in the ignition tamper circuit, Faulty ignition switch, Short circuit in the system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code B1847 Description

The diagnostic trouble code B1847 indicates an issue with the ignition tamper circuit being shorted to the battery. This means that there is a malfunction in the circuit that is responsible for detecting any unauthorized tampering or attempts to start the vehicle without the proper key. This can have serious implications for the security of the vehicle, as it may compromise the anti-theft system and make the vehicle more vulnerable to theft.

OBDII Code B1847 - Ignition Tamper Circuit Short To Battery
B1847 Code - Ignition Tamper Circuit Short To Battery

Common Causes of B1847

  1. Damaged wiring or connectors in the ignition tamper circuit
  2. Faulty ignition switch
  3. Short circuit in the system
  4. Malfunctioning anti-theft module

Symptoms of B1847

  1. Difficulty starting the vehicle
  2. Engine misfires or rough idling
  3. Intermittent stalling
  4. Reduced power or "limp mode" operation

How to Fix B1847

  1. Diagnose the issue using a scan tool to retrieve the trouble codes and inspect the ignition tamper circuit for any visible damage.
  2. Repair or replace damaged wiring or connectors in the ignition tamper circuit.
  3. Test the ignition switch for proper functionality and replace if necessary.
  4. Check for any short circuits in the system and repair as needed.
  5. Reset the vehicle's computer system and clear the trouble codes to ensure proper operation.

Cost to Fix B1847

The typical repair costs for addressing an ignition tamper circuit short to battery issue can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check with local shops for a more accurate estimate.

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Code B1847 Information for Specific Makes

  • B1847 Lexus — Short To Ground In Curtain Shield Squib Left 2nd Step Circuit
  • B1847 Scion — Short To Ground In Curtain Shield Squib Left 2nd Step Circuit
  • B1847 Toyota — Short To Ground In Curtain Shield Squib Left 2nd Step Circuit
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 B1847 Code

1. What are the common symptoms of OBDII code B1847 (Ignition Tamper Circuit Short To Battery)?

- Common symptoms include the vehicle not starting, the engine stalling unexpectedly, or the security light staying on.

2. What are the possible causes of OBDII code B1847?

- The code B1847 can be caused by a short circuit in the ignition tamper circuit, a faulty ignition switch, or damaged wiring.

3. How can I diagnose OBDII code B1847?

- Diagnosing code B1847 involves using a scan tool to retrieve the code, checking the ignition tamper circuit for shorts, and inspecting the ignition switch and wiring for damage.

4. Can I still drive my vehicle with OBDII code B1847?

- It is not recommended to drive your vehicle with code B1847, as it can lead to potential safety hazards and further damage to the vehicle's electrical system.

5. How can I repair OBDII code B1847?

- Repairing code B1847 involves fixing any short circuits in the ignition tamper circuit, replacing a faulty ignition switch, or repairing damaged wiring.

6. Will resetting the OBDII code B1847 make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not fixed, the code is likely to return.

7. How much does it cost to repair OBDII code B1847?

- The cost of repairing code B1847 can vary depending on the root cause of the issue, but it may involve replacing the ignition switch or repairing damaged wiring.

8. Can a DIY enthusiast fix OBDII code B1847?

- DIY enthusiasts with experience in automotive electrical systems may be able to diagnose and repair code B1847, but it is recommended to consult a professional if unsure.

9. Is OBDII code B1847 a common issue in certain vehicle makes and models?

- Code B1847 can be more common in certain vehicle makes and models known for ignition system issues, but it can occur in any OBDII-compliant vehicle.

10. How urgent is it to address OBDII code B1847?

- It is important to address code B1847 promptly to prevent potential safety hazards, further damage to the vehicle, and to ensure the vehicle operates correctly.

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