DTC P1504: Idle Air Control (IAC) Circuit Malfunction
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
P1504 - IDLE AIR CONTROL (IAC) CIRCUIT MALFUNCTION
| Description: | This DTC is set when the powertrain control module (PCM) detects an electrical load failure on the IAC output circuit. | ||
| Possible Causes: |
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| Diagnostic Aids: | The IAC solenoid resistance is 6 to 13 ohms. Monitor the IAC PID duty cycle and/or voltage. |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to KE: Idle Air Control (IAC) Valve STEP KE1. | ||