← View Generic B1086 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1086: B1086: 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 B1086 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 immobilizer system's communication with the engine control module.
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Symptoms

  • • Engine will not start
  • • or starts and stalls immediately
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Common Causes

  • • Faulty immobilizer system module
  • • faulty key fob
  • • faulty ignition switch
  • • or wiring issues
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How to Fix B1086 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the key fob battery level and replace it if necessary. 2. Check the immobilizer system module for any signs of physical damage or corrosion. 3. Check the ignition switch for any signs of wear or corrosion. 4. Check the wiring harness for any signs of damage or corrosion. 5. If none of the above steps resolve the issue, replace the immobilizer system module.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Immobilizer system module Shop ↗ Key fob battery Shop ↗ Ignition switch Shop ↗

Essential Tool

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OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B1086

B1084 Sequential Code

B1084: Seat Position Sensor Circuit Malfunction

Medium
B1085 Sequential Code

B1085: Body Control Module (BCM) Lighting Circuit Malfunction

Medium
B1087 Sequential Code

B1087: Audio System Malfunction

Medium
B1088 Sequential Code

B1088: 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