Originally Posted by DJDeez
The code number P2430 is properly noted as; Secondary air system mass air flow sensor rationality.
This fault is indicating that the Mass Air Flow Sensor (MAF) for the air intake of the secondary air injection system is giving a faulty signal. The MAF measures the amount of air flowing into the secondary air pump when it is running. Make sure that the harness plug is properly connected. If it is, the sensor may indeed be faulty.
Where is the plug? On the sensor?
2009 E90 ///
M3 SG Fox Red 6MT, AA X-pipe w/HFCs w/Eisenmann Sport, Dinan intake, AA Pulley, ZCP strut retro w/Dinan Stage III susp, BPM Stage II tune, Rear Fog LCI switch, BMW Edition Front & Side Grill/Gill, Smoked Reflectors, Black 19x9.5/10.5 APEX PS-7s & AiB v4-Now, Not Wife approved!!