What Causes the Auto Hold Malfunction Light to Illuminate?
2 Answers
Auto Hold malfunction light illuminates due to insufficient brake fluid in the vehicle's braking system, which affects braking safety. Details about Auto Hold are as follows: 1. Auto Hold: This refers to an automatic braking function. When activated (e.g., while waiting at traffic lights), it eliminates the need to engage the handbrake, simplifying operations by avoiding manual or electronic handbrake use. It also prevents frequent gear shifting between D-N or D-P in automatic transmission models. 2. Precautions: Auto Hold relies on intelligent braking systems and requires vehicles equipped with brake control systems like ESP to function properly.
Over the years, the most common automatic parking light malfunction I've seen in car repairs usually stems from dirty or damaged wheel speed sensors, causing the system to mistakenly think the wheels aren't turning and triggering an alarm. It could also be due to a faulty brake pedal switch or loose wiring connections, as those plastic connectors tend to break easily when aged. More frequently, it's caused by blown fuses or unstable circuit voltage, especially during rainy seasons when moisture infiltration can lead to short circuits. Sometimes, system software bugs may be the culprit, and turning the engine off and restarting a few times might solve the issue. I recommend first cleaning the wheel sensor area to see if the light goes off. If it remains on, use a diagnostic tool to read the fault codes—don't just start dismantling parts to save money; safety is more important than small savings. Most of the time, spending a hundred or two to replace a sensor or fuse will do the trick. Owners with good DIY skills can attempt simple maintenance themselves.
