P1504Idle Air Control (IAC) Circuit Malfunction
On Ford, the idle air control valve circuit is intermittent or faulty.
View on another brand:
Can I keep driving? With caution
You can drive to the shop, but do not postpone the repair. The problem may worsen and damage other components.
Sistema Afectado
Motor · Powertrain
La falla pertenece al grupo motopropulsor (motor y gestión electrónica).
Espacio para vendedores de repuestos
Aún no hay un anunciante en este espacio.
Symptoms You Will Notice
What you may observe when this code appears
- Unstable idle
- Engine stalls when stopping
- Fluctuating RPM
Possible Causes
The components or conditions that trigger this code
- 1Dirty or faulty IAC valve
- 2IAC wiring or connector
How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Clean the IAC valve
- 2Replace the IAC valve
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
Varies by diagnosis
* Diagnosis only: $50–$150
Quick Info
Dig Deeper
Videos, images and service manuals
Have Another Code?
Look it up directly: