← View Generic P1366 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

P1366: P1366: Fuel Injector Pulse Width Modulation Circuit Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$200 - $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 P1366 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The fuel injector pulse width modulation circuit has malfunctioned, which can cause poor engine performance, rough idling, and decreased fuel efficiency. (Toyota)
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Symptoms

  • • Poor engine performance
  • • rough idling
  • • decreased fuel efficiency
  • • decreased power
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Common Causes

  • • Faulty fuel injector
  • • faulty fuel injector pulse width modulation circuit
  • • faulty engine control module
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How to Fix P1366 on 2020 Chevrolet SILVERADO 1500 PICKUP

Replace the fuel injector, replace the fuel injector pulse width modulation circuit, reprogram the engine control module

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Fuel injector Shop ↗ Fuel injector pulse width modulation circuit Shop ↗

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with P1366

P1364 Sequential Code

P1364: Fuel Pressure Regulator Control Circuit Low Input

Medium
P1365 Sequential Code

P1365: Fuel Pressure Regulator Control Circuit Low Input

Medium
P1367 Sequential Code

P1367: Fuel Pressure Regulator Control Circuit Low Input

Medium
P1368 Sequential Code

P1368: Fuel Pressure Regulator Control Circuit Low Input

Medium

💡 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