DTC P2258: Secondary Air Injection (AIR) System Control A Circuit High

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

Description:	The AIR system monitor circuit is high, indicating the electrical AIR pump is on although the electrical AIR pump was commanded off by the powertrain control module (PCM).
Possible Causes:	AIR relay fault - stuck closed AIR pump fault - circuit open in motor Open ground to AIR pump Open AIR monitor circuit between the AIR pump and the PCM Short to voltage in the AIR relay to 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 AIR pump when the pump is off.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to HM: Secondary Air Injection (AIR) System STEP HM49.