What is code P1506?

P1506 FORD – Idle Air Control Overspeed Error…Possible causes; Faulty Idle Air Control (IAC) valve, IAC valve harness is open or shorted, IAC valve circuit poor electrical connection, Intake leaks, Stuck PCV Valve…The P1506 code means that the engine idle is out of factory specification.

How do you test a Ford IAC valve?

Checking the IAC valve internal circuitry:

1. Set the ignition key to the “off” position.
2. Unplug the IAC motor electrical connector.
3. Turn the ignition key to the “on” position; don’t start the engine.
4. Set your multimeter to 20 volts on the DC volts scale.
5. Connect your meter’s black lead to the battery negative post.

What is the IAC on a Ford F150?

F150 idle air control valve
The Ford F150 idle air control valve regulates how much air passes into the engine to mix with the fuel. When the valve becomes clogged, it restricts the flow of air and responds more slowly.

What happens if you unplug IAC valve?

If it works properly, stopping it would cause panic to your inactive engine. Normally, if you turn on your car, the inactive air control valve will increase and decrease the rpms engine slowly. It would be a sign that your IAC works.

What causes rpms to fluctuate at idle?

Why does my engine’s RPM seem to fluctuate (runs rough)? Many engine performance problems can be linked to maintenance issues such as stale fuel, dirty air filter, fouled spark plug, and deteriorated oil. Engine hunting and surging at idle is usually caused by a fuel delivery, air leak, or governor system problem.

Can I use wd40 to clean IAC valve?

Pull the tank and spray into the hole with the IAC mounted. Cycle the ignition a few times to get the carb or sensor cleaner to penetrate. Some people even use a little wd-40 spray. Removing the IAC is iffy.

What happens if you unplug IAC?

Can you adjust IAC valve?

If you removed the air intake, ensure you reconnect the MAF sensor (if equipped). Turn the ignition ON and leave on for several seconds then turn the ignition OFF to allow the ECM to reset the IAC valve. Any adjustments made to the idle speed, should be followed by adjusting your throttle position sensor (TPS).

What does the P1506 code mean on a Ford?

P1506 FORD Tech Notes The P1506 code means that the engine idle is out of factory specification. User Submitted Video The P1506 code sets when the Powertrain Control Module (PCM) detects an engine idle speed that is greater than the desired RPM.

What to do if your Ford P1506 wont start?

Disconnect the car battery, remove the valve, clean, re-install valve, and drive the vehicle for about 5 minutes with the headlights and A/C ON to get the idle relearned. Also, check for intake leaks or stuck PCV Valve. If the problem persistss, the IAC valve may need to be replaced. If playback doesn’t begin shortly, try restarting your device.

What causes a P1506 Ford to overspeed?

P1506 FORD Possible Causes 1 Faulty Idle Air Control (IAC) valve 2 IAC valve harness is open or shorted 3 IAC valve circuit poor electrical connection 4 Intake leaks 5 Stuck PCV Valve

What does the idle air control code P1506 do?

The P1506 code sets when the Powertrain Control Module (PCM) detects an engine idle speed that is greater than the desired RPM. The Idle Air Control Valve (IACV) valve assembly controls the engine idle speed and provides a dashpot function.