← View Generic B0846 Guide Severity: High
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0846: B0846: Immobilizer System Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2020 Chevrolet
SILVERADO 1500 PICKUP
⚠️

Important for 2020 Chevrolet SILVERADO 1500 PICKUP Owners

Before starting repairs, verify which engine your 2020 Chevrolet SILVERADO 1500 PICKUP has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does B0846 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The immobilizer system has detected a malfunction, preventing the vehicle from starting. This code is typically caused by a faulty immobilizer module, key fob, or wiring issue.
⚠️

Symptoms

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

  • • Faulty immobilizer module
  • • key fob
  • • wiring issue
  • • or incorrect key fob battery
🛠️

How to Fix B0846 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the key fob battery and replace if necessary. 2. Inspect the wiring harness for damage or corrosion. 3. Test the immobilizer module for proper function. 4. Replace the immobilizer module if faulty.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

immobilizer module Shop ↗ key fob Shop ↗ wiring harness Shop ↗

Essential Tool

Must Have

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Related Diagnostic Codes

Other codes that may appear with B0846

B0844 Sequential Code

B0844: Seat Position Sensor Malfunction

Medium
B0845 Sequential Code

B0845: Illumination Malfunction

Medium
B0847 Sequential Code

B0847: Audio System Malfunction

Medium
B0848 Sequential Code

B0848: Airbag System 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