![]() ![]() ![]() And while there are challengers to the throne, for now, and in the near future, conventional gas-powered engines are still the majority of what comes into a typical shop or dealership, and they are still subject to many of the same mechanical problems that have existed for years.ĭepending on the year, make and model, a vehicle’s Engine Control Module (ECM) can’t always set trouble codes for mechanical engine problems. It’s important to remember that underneath all that technology, the majority of automobiles and light trucks are still powered by four-stroke, gasoline engines. While this may work some of the time, it’s not the best way to address all engine performance problems. Many technicians have traveled down the wrong diagnostic path by reading OBD II diagnostic trouble codes (DTCs) with their scan tool and then replacing parts hoping to fix a problem.
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