![]() If anything, the warning lights are a more visible notification of the same information that is being displayed by a modern, "buffered" temperature gauge. When it is in the "normal" range, that is equivalent to no warning lights, and when it registers "hot", it may already be too late to avoid overheating your engine. When it is registering "stone cold", that is equivalent to the blue light. So, the modern temperature gauge is really just a glorified idiot light. That may have been true 12 or more years ago, but it is not true these days. Unfortunately, most folks seem to be unaware of the info noted above, and seem to think that their temperature gauge is a linear, laboratory-grade measuring device. However, the temperature gauges on recent Subarus (as well as on other makes with which I am familiar) are "buffered", meaning that they essentially only register three temperatures: Stone cold, "normal", and "your engine is overheating and you need to shut it down NOW". Either way, if you want to be kind to your engine and transmission, you will consider the blue light to be sort of a caution light, reminding you to accelerate gently and to avoid expressway speeds until the light goes off.Īs to the value of a temperature gauge-if the gauge is a "real" one, it can be of great value. In the winter, that might take 5 minutes. Even in the summer, that can take a minute or two. The presence of the blue warning light is to remind the driver that he/she should drive "conservatively" until the engine and transmission are warmed up. However, this is not a malfunction if the If the engine is restarted after a certain Steps for the case of engine overheating. This time, the engine may be overheating. ![]() RED, the electrical system may be malfunctioning. Indicator light/warning light often blinks in ![]() The blinking RED light turns off, you canĭrive the vehicle normally. Indicator light/warning light blinks in RED.Īt this time, decelerate the vehicle. If the engine coolant temperature increases Illumination in RED indicates overheatingįor the system check, this indicator light/Īpproximately 2 seconds when the ignitionĪfter that, this indicator light/warning lightĬhanges to BLUE and maintains illumination Illumination in BLUE indicates insufficient
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