Free API
Help
2020 HYUNDAI TUCSON
2.4L I4•AWD•AUTOMATIC•gas
1 active safety recall on this vehicle — view recalls
Founding sponsor spot is openYour name on every procedure for this vehicle, permanently.Sponsor — $99 →
Repairs0Labor970Torque3111Fluid16DTC3698Battery2Maintenance0Recalls1
P1506moderate severityPowertrain

IAC Valve Opening Coil Circuit Short

on 2020 Hyundai Tucson 2.4L I4 · AWD

What this code means

The PCM has detected a short circuit in the IAC valve opening coil circuit. This can cause the IAC valve to remain energized or draw excessive current, affecting idle speed control.

Symptoms

  • Check Engine Light
  • Erratic idle speed
  • High idle speed
  • IAC valve overheating

Common causes

  • Short to ground in IAC opening coil wiring
  • IAC valve internal coil short
  • Chafed wiring contacting ground
  • Connector with bridged pins
  • Water intrusion in connector

Diagnostic steps

  1. Test IAC opening coil resistance (low reading indicates short)
  2. Inspect wiring for chafing or damage
  3. Check connector for bridged pins or water intrusion
  4. Disconnect IAC and test circuit resistance to ground
  5. Replace IAC valve and retest

Repair notes

Replace the IAC valve if shorted internally; repair wiring if the short is external.

🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITE
Shop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Other Powertrain codes on this vehicle

🔌 Need this data in your app? It's all in the free API →
🔧 Built by master technician Chris Hackleman · Master Technician · 20+ years. Spot an error? Use the Help link above — a human reads every report.
Stuck on this repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
Share:XRedditFBWhatsAppThreadsEmail
⚠ STILL BEHIND THE PAYWALL
The 2020 Hyundai Tucson repair data is incomplete because no one has sponsored it yet. For $99, we generate the full step-by-step procedures, then fact-check them with a second AI pass and your expert review. Your name on every procedure, permanently.
The same data would cost $169/mo from Mitchell1 or $30/year from ALLDATAdiy — and you'd be renting access, not freeing it. Sponsor once, free forever.
Sponsor the Hyundai Tucson — $99 →
Building an app?
Free API access to all this data — 10 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with Auto Shop Base — $249/mo, all features included.
Try Auto Shop Base →