P2258 - Secondary Air Injection (Air) System Control A Circuit High

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2007 Mercury Mountaineer, 2007 Mercury Monterey, 2007 Mercury Montego, 2007 Mercury Milan, and 2007 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.

P2258 - SECONDARY AIR INJECTION (AIR) SYSTEM CONTROL A CIRCUIT HIGH

Description:	The AIR system monitor circuit is high, indicating the secondary AIR pump is on although the secondary AIR pump was commanded off by the powertrain control module (PCM).
Possible Causes:	AIR relay fault - stuck closed Secondary AIR pump fault - circuit open in motor Open ground to secondary AIR pump Open AIR monitor circuit between the secondary AIR pump and the PCM Short to voltage in the AIR relay to secondary AIR pump voltage circuit
Diagnostic Aids:	The AIR monitor circuit PCM input contains a pull up voltage through a resistance internal to the PCM. This voltage is normally held low by the resistance path through the secondary AIR pump when the secondary AIR pump is off.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	refer to PINPOINT TEST HM .