← Back to Search Severity: Medium

B0374

B0374: Immobilizer System Malfunction

Fix Cost
$50 - $200
Parts & Labor
Difficulty
3/5
Moderate
1-2 hours
DIY Possible?
❌ No
Pro recommended
Category
Body
System

📖 What Does B0374 Mean?

The immobilizer system, which prevents the engine from starting without the correct key, has malfunctioned. This code indicates a problem with the immobilizer system's communication with the vehicle's computer.
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Symptoms

  • Engine won't start
  • key fob won't work
  • or alarm system won't disarm
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Common Causes

  • Faulty immobilizer module
  • bad key fob battery
  • or incorrect key fob programming
Fix Guide
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Possible Solutions

1. Check the key fob battery and replace it if necessary. 2. Check the immobilizer module for any signs of physical damage or corrosion. 3. If the problem persists, reprogram the key fob or replace the immobilizer module.

Common Questions About B0374

Can I drive with code B0374?

You can drive for a short time, but should address code B0374 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0374?

The estimated repair cost for code B0374 is between $50 and $200. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0374 easy to fix myself?

This repair is considered moderate. It may require specialized tools or significant disassembly. If you are not an experienced mechanic, professional help is recommended.

Required Parts

Tools

multimeter diagnostic scanner
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Need a Pro?

Complex codes like B0374 can be tricky. Don't risk it if you're unsure.

Quick Stats

Severity Medium
DIY Friendly No
Est. Time 1-2 hours
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Related Diagnostic Codes

Other codes that may appear with B0374

💡 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