Does anyone know what this code means P1504?

 

P1504 Idle Speed Control Valve Closing Solenoid Control Open Circuit

In English, that's the IAC.

 

Check the wiring connection to the IAC. It also would be a good time to clean it while you are checking the connection. Do a search on IAC for a lot of great info and pics.

 

Note that is code indicates an ELECTRICAL fault.

Check the connector as torkum suggested. Measure the resistance of the IAC's coil. Make certain it is not open. Should be between 6 and 12 ohms.

If more detail is needed, let us know.

...also, please observe that this section of the forum is for F150s. Your Exploder would be properly covered in the "Other Models" area.


Steve