P1506 on 2000-2011 Ford Ranger — Idle Air Control Overspeed Error
1 vehicles · 1 makes · $100-$450 repair
Most Reported On
P1506 is an OBD-II diagnostic trouble code meaning “Idle Air Control Overspeed Error.” This manufacturer-specific code (common on Ford, Lincoln, Mazda, Mercury) means the engine computer detected that idle speed is higher than the target the Idle Air Control (IAC) system is commanding. The IAC valve meters air into the engine at idle to hold a steady RPM; when actual idle RPM runs too high, this overspeed code sets. You may notice a fast or surging idle. It is usually caused by unmetered air entering the engine (a vacuum leak) or a sticking IAC valve rather than a serious engine fault. This code is most commonly reported on 2000-2011 Ford Ranger, with repair costs ranging from $100 to $450.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P1506, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P1506 mean?
P1506 stands for "Idle Air Control Overspeed Error." This manufacturer-specific code (common on Ford, Lincoln, Mazda, Mercury) means the engine computer detected that idle speed is higher than the target the Idle Air Control (IAC) system is commanding. The IAC valve meters air into the engine at idle to hold a steady RPM; when actual idle RPM runs too high, this overspeed code sets. You may notice a fast or surging idle. It is usually caused by unmetered air entering the engine (a vacuum leak) or a sticking IAC valve rather than a serious engine fault.
What are the most common causes of P1506?
The most common causes of P1506 are: Vacuum leak letting in extra air, Dirty, sticking, or faulty idle air control (IAC) valve, Carboned-up or dirty throttle body, Stuck-open throttle plate or binding linkage, Faulty PCV system or leaking gasket, Wiring or connector fault at the IAC valve. The specific cause varies by vehicle.
How much does it cost to fix P1506?
Repair costs for P1506 range from $100 to $450, depending on the vehicle and root cause.
Which vehicles are affected by P1506?
Au7o has documented P1506 across 1 vehicle models from 1 manufacturers: Ford.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.