← View Generic B2478 Guide Severity: High
🚗 Vehicle-Specific Guide

This guide is customized for your 2019 Ford F150 PICKUP

B2478: B2478: Immobilizer System Malfunction

on 2019 Ford F150 PICKUP

Fix Cost
$200 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2019 Ford
F150 PICKUP
⚠️

Important for 2019 Ford F150 PICKUP Owners

Before starting repairs, verify which engine your 2019 Ford F150 PICKUP has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does B2478 Mean on 2019 Ford F150 PICKUP?

The immobilizer system has detected a malfunction, preventing the vehicle from starting. This code is typically set when the immobilizer system is not functioning correctly, preventing the vehicle from starting.
⚠️

Symptoms

  • • Vehicle will not start
  • • may display a 'security system malfunction' message on the dashboard
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Common Causes

  • • Faulty immobilizer system module
  • • faulty key fob
  • • low battery in key fob
  • • incorrect key fob programming
🛠️

How to Fix B2478 on 2019 Ford F150 PICKUP

1. Check the key fob battery level and replace if necessary. 2. Check the key fob programming and reprogram if necessary. 3. Check the immobilizer system module for any signs of physical damage or corrosion. 4. Replace the immobilizer system module if necessary.

🔧

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Parts for 2019 Ford F150 PICKUP

immobilizer system module Shop ↗ key fob Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B2478

B2476 Sequential Code

B2476: Seat Position Sensor Circuit Malfunction

Medium
B2477 Sequential Code

B2477: Exterior Lighting Malfunction

Medium
B2479 Sequential Code

B2479: Audio System Fault

Medium
B2480 Sequential Code

B2480: Airbag System Fault

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