Secondary air systems are designed to help the catalytic converter get up to operating temperature faster. When the system develops a problem, the ME control unit is capable of defining the fault. It’s our job to figure out the cause.
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Evaporative emissions have been tested and monitored by the ME since the beginning of OBD II regs in 1996. This system has been one of the more difficult air pollution-reduction systems to diagnose and verify. SDS software has made the job easier.
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With very few exceptions, the catalytic converter has been on every gasoline-burning car sold in the U.S. since 1975. Over those 36 years, we’ve sometimes seen them clog and lower engine performance, or lose their efficiency, setting codes and/or preventing a vehicle from passing an emissions test. Here’s how to make sure that cat’s really dead before replacing it.
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Even though there are almost 15 year’s worth of OBD II-compliant vehicles out there, EVAP system failures still often stump technicians. Let’s look at some techniques that’ll help you avoid that.
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With emissions and mpg both looming so large right now, you can’t have your customers driving around with the MIL on, but it’s not always so easy to find the cause of a fuel system glitch
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NOx failure without a MIL is not very common on newer Nissan and Infiniti cars, but older vehicles still have this type of emissions failure.
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Tank pollutants and OBD II regulations
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Tank pollutants and OBD II regulations
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Just like a blacksmith’s bellows, the Mercedes-Benz AIS “fans the flames,” promoting rapid oxidation of pollutants in the exhaust stream.
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Installing a new control unit to replace the failed one is only half the job. With various combinations of options available on the same model, the new unit has to learn which are installed and how to work with them.
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Since the early ‘90s, Mercedes-Benz has developed its Controller Area Network (CAN) to control how components communicate with each other and with us through our Compact III or Basic. How has this evolved, and what does it mean to diagnosis and repair?
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Automobile emissions are a hot topic among environmentalists, drivers and technicians. Mercedes-Benz vehicles utilize emissions systems, such as Exhaust Gas Recirculation, to reduce harmful pollutants.
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