What does code P1504 mean?

Q: What does code P1504 mean?

Intake Air Control Circuit Malfunction. P1504 on Ford vehicles indicates that the powertrain control module has detected an electrical fault in the intake air control circuit, which typically involves the intake manifold runner control solenoid or its wiring. The computer monitors the circuit for expected voltage or current and sets the code when the signal falls outside the normal range, often due to an open, short, or failed component.

DTC codes / Ford codes / P1504

P1504 · FordIntake Air Control Circuit Malfunction

P1504 on Ford vehicles indicates that the powertrain control module has detected an electrical fault in the intake air control circuit, which typically involves the intake manifold runner control solenoid or its wiring. The computer monitors the circuit for expected voltage or current and sets the code when the signal falls outside the normal range, often due to an open, short, or failed component.

SystemPowertrain

Code typeFord specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for Ford vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.