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Posted on Aug 27, 2011
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2000 ford explorer p1504 code on OBDII - 2001 Ford Mustang

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  • Posted on Aug 27, 2011
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P1504 Idle Air Control Circuit Malfunction here are possible causes IAC circuit open
VPWR to IAC solenoid open
IAC circuit short to PWR
IAC circuit short to GND
Damaged IAC valve
Damaged PCM

heres what I would check, This code means that there is a fault in your IAC valve located near the throttlebody.

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  • Posted on Aug 27, 2011
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P1504 code on OBDII, sounds like you need to check and or replace your Mass Airflow Sensor (MAF).

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