Free API
Back to 2004-2008 Chrysler Pacifica
Help
2004-2008 CHRYSLER PACIFICA
3.5L SOHC V6 (EGG/EGM, ~250 hp)•FWD•AUTOMATIC•gas
4 active safety recalls on this vehicle — view recalls
Founding sponsor spot is openYour name on every procedure for this vehicle, permanently.Sponsor — $99 →
Repairs0Labor481Torque3327Fluid7DTC1565Battery1Maintenance0Recalls4
P1299moderate severityPowertrain

Vacuum Leak Found IAC At Max

on 2004-2008 Chrysler Pacifica 3.5L SOHC V6 (EGG/EGM, ~250 hp) · FWD

What this code means

The PCM has determined that the idle air control motor is at its maximum closed position but the engine idle is still too high. This strongly indicates a vacuum leak is allowing unmetered air into the engine.

Symptoms

  • Check Engine Light
  • High idle speed
  • Idle does not come down
  • Rough idle
  • Hissing sound from engine bay

Common causes

  • Vacuum hose cracked or disconnected
  • Intake manifold gasket leak
  • Throttle body gasket leak
  • Brake booster vacuum leak
  • PCV valve or hose leak

Diagnostic steps

  1. Perform smoke test on intake system to locate vacuum leak
  2. Inspect all vacuum hoses for cracks or disconnections
  3. Check intake manifold gasket area with carb cleaner spray
  4. Test brake booster vacuum hose
  5. Inspect PCV system

Repair notes

Locate and repair the vacuum leak that is causing the high idle condition.

🔌 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 →
🔧 Database maintained under the daily editorial review of 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 2004-2008 Chrysler Pacifica 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 Chrysler Pacifica — $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 ShopBase — $249/mo, all features included.
Try ShopBase →