← View Generic B0662 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0662: B0662: Immobilizer System Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$50 - $200
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 B0662 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The immobilizer system has malfunctioned, preventing the engine from starting or running. This code is typically set when the immobilizer system detects a problem with the key fob, keyless entry system, or ignition switch.
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Symptoms

  • • Engine won't start
  • • engine cranks but won't start
  • • dashboard warning lights illuminated
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Common Causes

  • • Faulty key fob
  • • keyless entry system malfunction
  • • ignition switch problem
  • • immobilizer system wiring issue
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How to Fix B0662 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the key fob battery level and replace if necessary. 2. Try resetting the immobilizer system by disconnecting the battery for 30 minutes. 3. Check the keyless entry system for any issues. 4. Inspect the ignition switch for signs of wear or damage. 5. Check the immobilizer system wiring for any damage or corrosion.

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Need Maintenance Info for Your SILVERADO 1500 PICKUP?

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

key fob Shop ↗ keyless entry module Shop ↗ ignition switch Shop ↗

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with B0662

B0660 Sequential Code

B0660: Seat Switch Circuit Malfunction

Medium
B0661 Sequential Code

B0661: Turn Signal Lamp Malfunction

Medium
B0663 Sequential Code

B0663: Audio System Fault

Medium
B0664 Sequential Code

B0664: 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