You should listen to Terry. Though I haven't reset a Dodge yet. There are many cars out there that costs more than $50 to reset. Dealer only. Also you don't disconnect the positive side of the battery. Disconnect the negative. This eliminates any surges back to the computer/s. Which can kill them. Another note. If you didn't fix the problem, the light will come back on.
Be advised, that while the process Frederick gives may reset the Check Engine light, you may also find yourself facing another situation that you may or may not be ready for.....a radio lockout code. Disconnecting the battery in many vehicles today will cause the radio in the vehicle to require a reset code to regain operation. We get many requests here a FixYA for these codes because people either don't know where to find their code, or possibly never received one is they bought the car used. The recommended way to reset the Check Engine light is with an OBDII code scanner tool, which can be purchased at local auto parts stores for around 50 dollars. While that may seem a bit high just to reset a light, it also provides you the means to read the diagnostic codes when the Check Engine light lights and can make fixing the car much easier and cheaper.
Check and make sure All fluids are Full, oil, brake, trans, etc... they all have low sensors tied to check engine indicator, then disconnect the Pos+ from the battery for one minute, then reconnect,
the engine light should then reset...
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