![]() Honda issued the recall (service bulletins 17-057 and 17-069) to check and, if needed, replace the battery management sensor in the 2013-2016 Honda Accord (except Hybrid). A faulty battery sensor can also cause the code P154A in some Acura vehicles. The bulletin advises changing the battery sensor. The Honda bulletin 16-026 for various Accord, Fit and HR-V models describes a problem where a faulty battery sensor can cause Charging System Indicator to come on with the trouble code (DTC) P154A. A battery sensor is a fragile device and can also be damaged when servicing or removing the battery. A failed IBS is known to cause a variety of electrical problems, including a no-start. BMW calls it the Intelligent Battery Sensor, or IBS. For example, in some BMW vehicles, the battery is located in the side compartment in the trunk and water leaking onto the battery can damage the sensor. The most common problem is when the dirt, moisture or battery acid get into the sensor and damage or short it. To function properly, the battery sensor must be clean and dry, and the pole terminal must be tight. Many electrical problems, including issues with the battery current sensor can be caused by loose or corroded battery terminals or moisture/corrosion around the battery sensor. For this reason, in some vehicles, if the sensor has been disconnected or the battery has been replaced, the Stop-Start feature might not work for some time, until the computer (BCM or PCM) re-learns the parameters of the battery. The charging system current is also often higher in vehicles with Stop-Start feature. If the battery is low on charge, the Stop-Start feature is disabled. Verify that the battery has enough charge to re-start the vehicle. The function of the battery sensor is particularly important in vehicles with Stop-Start feature, as the battery management system must
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