Reset the check engine codes using a scan tool by attaching the tool to the OBD II diagnostic connector, reading and recording the codes, and pressing the erase button. Complete the process a few minutes. In some instanc... More »

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The only ways to reset the check engine light on a Dodge Neon are to use an onboard diagnostics tool or to disconnect the battery. Although disconnecting the battery resets the check engine light in most cases, most mech... More »

If the problem has been diagnosed and fixed but the check engine light is still on, either use an auto scan tool or simply disconnect and reconnect the battery. If there is still a problem with the engine, disconnecting ... More »

To read engine diagnosis codes, plug the code reader into the 16-pin OBD II diagnostic connector (typically found under the dash by the steering column), then turn the ignition on, but do not start the engine, according ... More »

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Use a car code reader by plugging the device into the diagnostic link connector of the vehicle with the engine off. The connector is generally located under the dash. After plugging in the car code reader, turn the vehic... More »

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To read engine trouble codes for newer cars, find the 16-pin OBD II diagnostic plug and plug in the code reader or scan tool. Turn the car on but do not start the engine. The process varies depending on the code reader, ... More »

A flashing check engine indicator light typically means that an engine misfire is happening. This may be a minor misfire, simply affecting performance and emissions, or it could indicate a major misfire. Continuing to dr... More »

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