P2258 GMC Secondary Air Injection System Control A Circuit High
Possible causes
– Air Injection Pump Relay harness is open or shorted
– Air Injection Pump Relay circuit poor electrical connection
– Faulty Air Injection Pump Relay
– Air Injection Pump Relay circuit poor electrical connection
– Faulty Air Injection Pump Relay
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
GMC Vehicle:GMC Acadia,GMC Canyon,GMC Envoy,GMC Savana 1500,GMC Savana 2500,GMC Savana 3500,GMC Sierra 1500,GMC Sierra 2500 HD,GMC Sierra 3500 HD,GMC Terrain,GMC Yukon,GMC Yukon XL 1500,GMC Yukon XL 2500,