← View Generic B0046 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0046: B0046: 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 B0046 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The immobilizer system, which prevents the engine from starting without the correct key, has malfunctioned. This code indicates a problem with the system's communication or authentication process.
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Symptoms

  • • Engine won't start
  • • or starts and then stalls
  • • or starts with difficulty
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Common Causes

  • • Faulty immobilizer module
  • • incorrect or damaged key
  • • low battery voltage
  • • faulty wiring or connectors
🛠️

How to Fix B0046 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the battery voltage and charge it if necessary. 2. Inspect the wiring and connectors for damage or corrosion and repair or replace as needed. 3. Try replacing the immobilizer module. 4. If the problem persists, try replacing the key or keyless entry fob.

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Need Maintenance Info for Your SILVERADO 1500 PICKUP?

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

immobilizer module Shop ↗ key or keyless entry fob Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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🔗

Related Diagnostic Codes

Other codes that may appear with B0046

B0044 Sequential Code

B0044: Seat Position Sensor Circuit Malfunction

Medium
B0045 Sequential Code

B0045: Low Beam Headlight Relay Circuit Malfunction

Medium
B0047 Sequential Code

B0047: Audio System Malfunction

Medium
B0048 Sequential Code

B0048: 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