DTC P0505: Idle Air Control (IAC) System
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2006 Mercury Mountaineer, 2006 Mercury Monterey, 2006 Mercury Montego, 2006 Mercury Mariner, and 2006 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
P0505 - IDLE AIR CONTROL (IAC) SYSTEM
| For Vehicles With Electronic Throttle Control (ETC) | |||
| Description: | The powertrain control module (PCM) attempts to control engine speed during the key on, engine running (KOER) self-test. The test fails when the desired RPM could not be reached or controlled during the self-test. | ||
| Possible Causes: |
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| Diagnostic Aids: | This DTC is informational only and it may be accompanied by other DTCs. Diagnose other DTCs first. If other DTCs are not present inspect the intake air system for air restrictions, vacuum leaks, and damage. If no concerns are present, clear the DTC and repeat the self-test. | ||
| For All Others | |||
| Description: | The powertrain control module (PCM) attempts to control engine speed during the key on, engine running (KOER) self-test. The test fails when the desired RPM could not be reached or controlled during the self-test. | ||
| Possible Causes: |
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| Diagnostic Aids : | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Vehicles With Electronic Throttle Control (ETC) | Refer to the Description, Possible Causes and Diagnostic Aids for the DTC. | ||
| All others | GO to Pinpoint Test KE . | ||