Grand AM L4-144 2.4L DOHC VIN T SFI (1997)
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Whenever the IAC valve is disconnected and reconnected while the engine is running, the resulting IAC valve counts may not correspond with
the actual IAC valve pintle position. When servicing the IAC valve, it should only be disconnected or connected after the ignition has been
OFF for at least 10 seconds. This allows time for the PCM to move the IAC valve to the 150 count position where it is parked while the
ignition is OFF. Whenever this procedure is not followed, the PCM will lose track of IAC valve position resulting in starting or idle control
problems until the IAC valve is reset and pintle position is relearned.
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IAC system problems may cause improper idle speeds, resulting in a DTC P0506 or a DTC P0507. The DTC P0506 or the DTC P0507 tables
should be used to diagnose these problems.
