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It can be almost immediate depending on which monitor. The amount and specific monitors vary between autos. Some monitors will not run if there is a different monitor that fails. Typically, there is a drive cycle that must be performed for all of the monitors to set. This also varies from car to car. In most instances the cooling system and fuel temperature must be ambient or the same before beginning. Unless your car has a fuel temperature sensor, the drive cycle must start from a cold start. This can be a tough operation to perform and complete due to other traffic or speed limits or signals. If you are unable to follow it, all the monitors do not reset.

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โˆ™ 2015-07-16 18:22:06
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Q: How long does it take for your OBD2 systems to reset?
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