Failed Vehicle Info I VIR Explanation I Test Limits I Emission Repair Facility Report I TSB Link I Technical Assistance I Why Emission Readings Vary

Technical Service Bulletins
If your vehicle has failed an emissions or OBD inspection, it is important to check whether there are any Technical Service Bulletins (TSBs) related to your inspection failure. TSBs are issued by vehicle manufacturers to help automotive technicians diagnose and repair problems reported by consumers and auto repair shops. TSBs contain up-to-date factory fixes for difficult to diagnose problems such as reoccurring diagnostic codes, high emissions, and drivability problems. They also describe service procedures that may improve performance, reduce future breakdowns, or show a factory authorized modification for your vehicle.

A good resource for seeing if there are any TSBs related to your vehicle is the National Transportation Highway Safety Administration (NHTSA) web site. The National Highway and Traffic Safety Administration (NHTSA) is responsible for investigating possible design and manufacturing defects in vehicles. The NHTSA database of TSBs (one of many such resources) is regularly used by mechanics to diagnose problems with cars and trucks and to look for problems that might occur in the future when doing a general "check-up" on a car. This database is accessible to everyone and can be found online at http://www.nhtsa.dot.gov/cars/problems/tsb/