The basis behind this is when a battery fails, it can cause interruptions to the constant signals it sends to the ECU. If you encounter this issue, there are a multitude of things that could be wrong, but doing a simple battery check is the first and easiest place to start. The battery will have enough voltage to start the vehicle, but then it immediately dies and will not idle. This is a very strange issue that can indeed happen on certain makes / models of vehicles. Visit your local AutoZone store for a free diagnosis. But you may get lucky and discover that it’s only your car battery that needs replacement. Generally, this light identifies serious problems in your engine that will require costly maintenance. The check engine light flashes or stays on constantly. Have a technician check to see how much charge it has. ![]() At around the four-year mark, you should pay more attention to it. The average life span of a car battery is typically between four to six years. AutoZone recommends replacing the battery quickly. So this smell is potentially the costliest problem listed here if you aren’t proactive in fixing it. It has also released sulfuric acid that could harm other parts of your engine. If you smell rotten eggs, this means that your battery has vented gas. Usually, a battery has no smell, by design. If the battery smells – This is a warning sign that your battery is ready to fail, if it hasn’t already. Damage to the battery has already been done and cannot be reversed. This over charging of the battery is caused by a buildup of hydrogen gases faster than the battery can dissipate. If you have a bloated battery, the alternator has a faulty voltage regulator and has over charged the battery. The manufacturer designs your battery to have a specific footprint, and if the battery swells in size, you should be able to see it. If these flicker or dim before starting, your battery charge is weak. When the ignition is in the ON position, the battery will run the radio, windshield wipers, and headlights, among other electronic devices. ![]() Don’t mistake it for a minor inconvenience. Get the battery tested as soon as possible, and do not rely on the alternator to charge the battery back up! Keep in mind, jump-starting the car in these situations should only be done in an emergency. When the battery is low, it cannot deliver that power but often can still supply enough power for lights or accessories, that don’t require as much amperage. The purpose of the battery is to crank the engine by providing a full dose of high-amperage power to the starter. Your lights work, the radio works, but you get a click or buzz once you hit the key. ![]() If a slow starting battery seems to be able to take a charge and test fine, it’s likely that a parasitic drain, or draw is discharging the battery while the vehicle sits, and the electrical system will need to be looked at. If you notice this behavior suddenly and the temperature hasn’t dropped – a slow, dragging start suddenly begin, get your battery tested as soon as possible and don’t ignore it. When temps drop below 21 degrees, generally any car’s starting cadence will slow down.
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