 In February 2012 General Motors began deliveries of a low emission version destined for California that features a new low emissions package that allows the 2012 Chevrolet Volt to qualify as an enhanced , advanced technology – partial zero emissions vehicle ( enhAT @-@ PZEV ) and have access to California ’ s high @-@ occupancy vehicle lanes ( HOV ) . The new standard California version of the Volt features a modified engine and exhaust components . The catalytic converter was modified to add a secondary air @-@ injection pump that " streams ambient air into the exhaust stream to increase its ability to remove pollutants . " Owners of a 2012 Volt with the low emissions package are eligible to apply for one of 40 @,@ 000 available HOV lane stickers issued to vehicles that qualify as a California AT @-@ PZEV . The permits are handed out on a first @-@ apply , first @-@ served basis . Additionally , the new low emissions package makes the 2012 Volt eligible for owners to receive up to US $ 1 @,@ 500 in state rebates through the state ’ s Clean Vehicle Rebate Project ( CVRP ) . This incentive is in addition to the federal government ’ s US $ 7 @,@ 500 tax credit . Only the 2012 Volts manufactured after February 6 , 2012 , are fitted with the low emission package and sold as standard models in California . Other states where the Volt has solo driving access to HOV lanes are Florida , Georgia , New York and Virginia . 
