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.
What causes IAC system overspeed error P1506?
PS the error code has always been “p1506 IAC system overspeed error”. A vacuum leak will also cause the “overspeed” error code. The only thing the computer knows is that there’s too much air getting into the engine and it’s causing it to idle too fast.
Why does my car have a P1506 trouble code?
Air leaks into the engine AFTER the MAF has already metered the incoming air. So the oxygen sensor sees a very lean exhaust. Since the vehicle is at idle, the computer tries to reduce incoming air by shutting down the IAC. Once it commands less air and stills sees an idle that’s too high, it sets a P1506 trouble code.
What to do if your idle air control is not working?
Sometimes the Idle Air Control (IAC) may have carbon built up. 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.
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.
PS the error code has always been “p1506 IAC system overspeed error”. A vacuum leak will also cause the “overspeed” error code. The only thing the computer knows is that there’s too much air getting into the engine and it’s causing it to idle too fast.
Air leaks into the engine AFTER the MAF has already metered the incoming air. So the oxygen sensor sees a very lean exhaust. Since the vehicle is at idle, the computer tries to reduce incoming air by shutting down the IAC. Once it commands less air and stills sees an idle that’s too high, it sets a P1506 trouble code.
Sometimes the Idle Air Control (IAC) may have carbon built up. 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.
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
How much does it cost to repair a P1506 Ford?
The cost to diagnose the P1506 FORD code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type.