Clean Diesel Technologies, Inc. Addresses NASDAQ Trading Halt

Clean Diesel Technologies, Inc. (Nasdaq:CDTID) announced that it has been contacted by NASDAQ regarding the activity in Clean Diesel's common stock. Clean Diesel has advised NASDAQ that it is unaware of any material undisclosed corporate developments which would account for recent trading activity.

About the Company

Clean Diesel Technologies, Inc. (Nasdaq:CDTID), "Clean Diesel", "CDT" or the "Company" is, with the recent business combination with Catalytic Solutions, Inc. ("CSI"), a vertically integrated global manufacturer and distributor of emissions control systems and products, focused in the heavy duty diesel (HDD) and light duty vehicle (LDV) markets. As a cleantech company, CDT utilizes its proprietary patented Mixed Phase Catalyst (MPC®) technology, as well as its ARIS® selective catalytic reduction; Platinum Plus® Fuel-Borne Catalyst (FBC), and other technologies to provide high-value sustainable solutions to reduce emissions, increase energy efficiency and lower the carbon intensity of on- and off-road engine applications. CDT is headquartered in Ventura, California, along with its wholly-owned subsidiary, CSI, and currently has operations in the U.S., Canada, U.K., France, Japan and Sweden as well as an Asian joint venture. For more information, please visit www.cdti.com and www.catsolns.com.

The Clean Diesel Technologies, Inc. logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=5742

CONTACT:  Clean Diesel Technologies, Inc.
          Kristi Cushing, Investor Relations Manager
          [phone]