← View Generic B2046 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B2046: B2046: 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 B2046 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

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

  • • Engine won't start
  • • immobilizer light on dashboard
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Common Causes

  • • Faulty immobilizer sensor
  • • faulty key fob
  • • low battery voltage
  • • wiring issues
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How to Fix B2046 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check key fob battery level and replace if necessary. 2. Check immobilizer sensor wiring and connections. 3. Replace immobilizer sensor if faulty. 4. Update immobilizer system software if necessary.

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Need Maintenance Info for Your SILVERADO 1500 PICKUP?

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

immobilizer sensor Shop ↗ key fob battery Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2020 Chevrolet SILVERADO 1500 PICKUP

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🔗

Related Diagnostic Codes

Other codes that may appear with B2046

B2044 Sequential Code

B2044: Seat Switch Circuit Malfunction

Medium
B2045 Sequential Code

B2045: Body Control Module (BCM) Malfunction - Lighting

Medium
B2047 Sequential Code

B2047: Audio System Malfunction

Medium
B2048 Sequential Code

B2048: 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