Evaporative emissions: These are produced from the evaporation of fuel, and are a large contributor to urban smog, since these heavier molecules stay closer to ground level. Fuel tends to evaporate in these ways:
Gas tank venting: The heating of the vehicle as the temperature rises from night to day, mean that gasoline in the tank evaporates, increasing the pressure inside the tank above atmospheric pressure. This pressure must be relieved and before emissions control it was simply vented into the atmosphere.
In 1996 and newer vehicles, the federal government required manufacturers to place a leak detection pump on vehicles. This pump services the purpose of putting a vacuum on the system to detect leaks. Because of this system, loose gas caps and filling the vehicle with gas while the engine is running can cause the light to come on.
Our Service
Engine Maintenance and Questions Guide
Just to let you know…
If your check engine light comes on, there is no need to panic right away!
When the ignition switch is initially turned on and the engine is not running, the malfunction indicator lamp lights for a bulb check. While the engine is running, the MIL will light only if there is an emissions-related concern.
The onboard diagnostic (OBD) generation II system continuosly monitors all engine and transmission sensors and actuators looking for electrical faults, as well as values that do not logically fit with other powertrain data. When certain operating conditions are met and a comprehensive monitor detects a failure that will result in emissions exceeding a predetermined level, the computer stores a diagnostic trouble code and illuminates the MIL.
The onboard diagnostic II system also actively tests some systems for proper operation while the vehicle is being driven. Fuel control and engine misfire are checked continuosly, catalyst efficiency, exhaust gas recirculation operation, evaporative system integrity, oxygen sensor response and oxygen sensor heaters are tested once per trip when prerequisite operating conditions are met. The computer will illuminate the MIL if during these prerequisite operating conditions the system detects a failure that will result in emissions exceeding a predetermined level.
Whenever an engine misfire severe enough to damage the catalytic converter is detected, the MIL will blink on and off.
Once lit, the MIL will remain on until the vehicle has completed three consecutive good trips. The MIL is also turned off when stored diagnostic codes are cleared. However, the MIL will only remain off if the fault is successfully repaired.
When the ignition switch is initially turned on and the engine is not running, the malfunction indicator lamp lights for a bulb check. While the engine is running, the MIL will light only if there is an emissions-related concern.
The onboard diagnostic (OBD) generation II system continuosly monitors all engine and transmission sensors and actuators looking for electrical faults, as well as values that do not logically fit with other powertrain data. When certain operating conditions are met and a comprehensive monitor detects a failure that will result in emissions exceeding a predetermined level, the computer stores a diagnostic trouble code and illuminates the MIL.
The onboard diagnostic II system also actively tests some systems for proper operation while the vehicle is being driven. Fuel control and engine misfire are checked continuosly, catalyst efficiency, exhaust gas recirculation operation, evaporative system integrity, oxygen sensor response and oxygen sensor heaters are tested once per trip when prerequisite operating conditions are met. The computer will illuminate the MIL if during these prerequisite operating conditions the system detects a failure that will result in emissions exceeding a predetermined level.
Whenever an engine misfire severe enough to damage the catalytic converter is detected, the MIL will blink on and off.
Once lit, the MIL will remain on until the vehicle has completed three consecutive good trips. The MIL is also turned off when stored diagnostic codes are cleared. However, the MIL will only remain off if the fault is successfully repaired.
About Our Company
Bob Brady Auto Mall is a name recognized all over central Illinois. Our roots began with Bob Brady Dodge and was made popular through the Brady Bunch jingle that played for years on television and radio stations. The Bob Brady Auto Mall now sells five lines of new vehicles: Chrysler, Dodge, Honda, Hyundai and Mitsubishi.
NO NONSENSE REPRESENTATION
When it comes to quality representation, our tag line says it all, "No Nonsense". There is no bigger priority than representing every person who comes through the door with "knock your socks off" service.
We want every customer to receive a “world-class” deal. Getting a deal means value for your trade-in, value on your new vehicle, and no nonsense. Knowing the right questions to ask and having a personality to openly discuss your wants and needs is a gift we enjoy sharing with my customers.
NO NONSENSE REPRESENTATION
When it comes to quality representation, our tag line says it all, "No Nonsense". There is no bigger priority than representing every person who comes through the door with "knock your socks off" service.
We want every customer to receive a “world-class” deal. Getting a deal means value for your trade-in, value on your new vehicle, and no nonsense. Knowing the right questions to ask and having a personality to openly discuss your wants and needs is a gift we enjoy sharing with my customers.
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