Clear a check engine light by disconnecting the battery cables and turning on the headlights to drain all of the electricity from the system. This makes the vehicle's computer perform a hard reset and extinguishes the ch... More »

The Check Engine or Service Engine Soon indicators illuminate when responding to a sensor detecting a problem, and the indicator generally stays on until the problem is repaired. If the indicator light goes off, it can m... More »

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The light can be cleared by fixing the original malfunction, disconnecting the battery, or resetting the on-board diagnostic, or OBD, system with a scanner. It is important to ascertain the cause of the light before clea... More »

A blinking check engine light means that the onboard diagnostic system detected a problem with the engine. A blinking light, rather than a steady light, often indicates a serious engine misfire. A driver with a blinking ... More »

To reset the check engine light on a Dodge, open the hood, disconnect the battery, turn all of the lights on, honk the horn to exhaust the residual power, and reconnect the battery. This 30-minute procedure requires the ... More »

Tips for engine installation include removing the hood, disconnecting the battery, taking a picture of the electrical wiring harness, unplugging throttle cables, fuel lines and hoses that lead to the radiator and drainin... More »

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The check engine light flashes yellow when the electronic-control system of an automobile finds a problem it cannot adjust. The computer stores a trouble code in its memory to help identify the probable source of the pro... More »