D and H Enterprises Auto Repair

Smog Repair Concord

Smog Repair Concord

D&H Enterprises performs State required smog repair and smog inspections for the entire Concord area. We are equipped and have the expertise to perform smog diagnostics and smog repair to all systems and components on those vehicles that are residing, commuting, and passing through Concord.

Today's vehicles are sophisticated, computer integrated machines engineered to reduce smog emissions when in proper operating condition. California State regulations require smog testing every two years on certain model years. Non-passing vehicles must get smog repair in order to pass the emissions tests. In addition, Concord, and the whole of Contra Costa County, is an enhanced smog emissions testing area. This requires the testing of vehicles with specialized smog equipment that can actually simulate on-road driving conditions. D&H Enterprises uses smog testing equipment that includes the state-of-the-art ESP System One® Bar-97 certified five-gas analyzer equipped with a dynamometer and Delphi Evaporative Emissions Tester.

Our smog testing may reveal some elements within your vehicle that require smog repair. These may include the following:

  • Ignition timing
  • Ignition system
  • Vacuum leaks
  • Catalytic converter failure
  • Air injection system problems
  • Engine damage
  • Sensor problems
  • Computer problems
  • EGR system
  • Air/Fuel ratio
  • Restricted flow and low pressure
  • Thermostatic air cleaner
  • Early fuel evaporation

Bring your vehicle in for smog repair and smog testing to our Concord facility, located at 2689 Monument Road, Concord, CA 94520. Not sure where we are in Concord? Click here for a map to D&H Enterprises.

Contact us for an appointment online, or call us at 925-356-0683.

Got questions? Feel free to Ask Jack if you have questions about smog repair.

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  AAA Waranty     ACDelco Warranty     12 12 Warranty  
The AAA Warranty allows our customers to take advantage of a nationwide warranty at any AAA approved facility. Which means if your car needs repair in Florida, just look for an AAA approved shop.
Our ACDelco Warranty covers all ACDelco parts and products nationwide up to 12 months or 12,000 miles of the original repair date. Simply contact the toll free consumer assurance.
Our service is beyond compare. Our 12/12 Warranty guarantees that all parts and labor done at D&H Enterprises, is covered for 12 months or 12,000 miles whichever comes first!