What causes P1506 on a Ford?

Vacuum leak letting unmetered air past the throttle Carbon-fouled or sticking idle air control valve Throttle plate coked open or misadjusted stop screw Stuck-open EGR valve at idle Faulty IAC driver circuit holding the valve open

How do I fix P1506 on a Ford?

Smoke test the intake system for vacuum leaks first Remove and clean the IAC valve and throttle body Compare commanded versus actual idle RPM on a scan tool Check the EGR valve for sticking open at idle Replace the IAC valve if cleaning does not restore idle control

P1506 Idle Air Control Overspeed Error

Q: What does P1506 mean on a Ford?

P1506 — Idle Air Control Overspeed Error. Applies to F-150, Mustang, Ranger, Explorer with IAC valves.

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: F-150, Mustang, Ranger, Explorer with IAC valves

What does P1506 mean on a Ford?

P1506 — Idle Air Control Overspeed Error. This Ford-enhanced code applies to F-150, Mustang, Ranger, Explorer with IAC valves.

Common causes of P1506

Vacuum leak letting unmetered air past the throttle
Carbon-fouled or sticking idle air control valve
Throttle plate coked open or misadjusted stop screw
Stuck-open EGR valve at idle
Faulty IAC driver circuit holding the valve open

How to fix P1506

Smoke test the intake system for vacuum leaks first
Remove and clean the IAC valve and throttle body
Compare commanded versus actual idle RPM on a scan tool
Check the EGR valve for sticking open at idle
Replace the IAC valve if cleaning does not restore idle control