← Back to Search Severity: High

B0494

B0494: Immobilizer System Malfunction

Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
Moderate
1-2 hours
DIY Possible?
❌ No
Pro recommended
Category
Body
System

📖 What Does B0494 Mean?

The immobilizer system has detected a malfunction, which prevents the vehicle from starting. This code indicates a problem with the immobilizer system, which is designed to prevent theft by disabling the engine unless the correct key is present.
⚠️

Symptoms

  • • Vehicle will not start
  • • may have a flashing immobilizer light on the dashboard
🔍

Common Causes

  • • Faulty immobilizer key
  • • bad battery
  • • faulty immobilizer module
  • • wiring issues
Fix Guide
🛠️

Possible Solutions

1. Check the battery voltage and charge it if necessary. 2. Try a different key if the problem persists. 3. Check the immobilizer module and wiring for damage or corrosion. 4. Replace the immobilizer module if necessary.

❓ Common Questions About B0494

Can I drive with code B0494?

No, it is not recommended. Seeing code B0494 indicates a serious issue that could damage your engine or transmission if ignored. You should stop driving and have it inspected immediately.

How much does it cost to fix code B0494?

The estimated repair cost for code B0494 is between $100 and $500. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0494 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 wire tester
👨‍🔧

Need a Pro?

Complex codes like B0494 can be tricky. Don't risk it if you're unsure.

Quick Stats

Severity High
DIY Friendly No
Est. Time 1-2 hours
🔗

Related Diagnostic Codes

Other codes that may appear with B0494

B0492 Sequential Code

B0492: Seat Position Sensor Circuit Malfunction

Medium
B0493 Sequential Code

B0493: Body System Code - Lighting Functionality

Medium
B0495 Sequential Code

B0495: Audio System Fault

Medium
B0496 Sequential Code

B0496: Airbag System - Deployment Sensor Circuit Malfunction

High

💡 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