Possible causes
– AIR relay stuck closed
– Open ground circuit
– Open monitor circuit between AIR pump and Engine Control Module (ECM)
– Open ground circuit
– Open monitor circuit between AIR pump and Engine Control Module (ECM)
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P2258 FORD OBD Code Description
The Engine Control Module (ECM) commanded the electrical AIR pump off but detected the pump was on