Information";
OC Oxidation catalyst;
TWC Three-way catalyst;
AIR Secondary air injection (pump);
PAIR Pulsed secondary air injection;
DFI Direct fuel injection;
O2S Oxygen sensor;
HO2S Heated oxygen sensor;
EM Engine modification;
CFI Continuous fuel injection;
MFI Multi-port (electronic) fuel injection; and
TBI Throttle body (electronic) fuel injection.
40 C.F.R. §86.413-2006