← View Generic P0502 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

P0502: P0502: Idle Air Control (IAC) Valve Circuit Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
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 P0502 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The idle air control (IAC) valve circuit is malfunctioning, causing the engine to idle rough or stall. This code is often accompanied by other symptoms such as a rough idle, stalling, or hesitation when accelerating.
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Symptoms

  • • Rough idle
  • • stalling
  • • hesitation when accelerating
  • • poor engine performance
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Common Causes

  • • Faulty idle air control (IAC) valve
  • • vacuum leaks
  • • faulty throttle position sensor
  • • faulty crankshaft position sensor
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How to Fix P0502 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check and clean the IAC valve and its associated vacuum hoses. 2. Replace the IAC valve if it's faulty. 3. Inspect and repair any vacuum leaks. 4. Check and replace the throttle position sensor if it's faulty. 5. Check and replace the crankshaft position sensor if it's faulty.

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Need Maintenance Info for Your SILVERADO 1500 PICKUP?

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Idle Air Control (IAC) Valve Shop ↗ Vacuum Hoses Shop ↗ Throttle Position Sensor Shop ↗ Crankshaft Position Sensor Shop ↗

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Related Diagnostic Codes

Other codes that may appear with P0502

P0500 Sequential Code

Vehicle Speed Sensor Malfunction

Medium
P0501 Sequential Code

P0501: Idle Air Control (IAC) Valve Circuit Malfunction

Medium
P0503 Sequential Code

P0503: Idle Air Control (IAC) Motor Circuit Malfunction

Medium
P0504 Sequential Code

P0504: Idle Air Control (IAC) Valve Circuit Malfunction

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