What are the symptoms of a broken onboard computer?

[EmersynMarie]

The symptoms of a broken onboard computer are: 1. The dashboard displays incorrectly or appears dim; 2. The onboard computer screen goes black; 3. The dashboard does not display or the engine cannot start even with power; 4. The car doors cannot be opened. The onboard computer is typically used to calculate instantaneous consumption, driving mileage, temperature, average speed, average consumption, or to set maintenance reminders and alert the driver to rest. The reasons for a broken onboard computer are: 1. Waterlogged vehicles may cause corrosion on the computer board, leading to open circuits, adhesion, or damage to component pins; 2. During car charging, if the charger voltage is set too high, the polarity is reversed, the key is turned on while charging, or the battery connection is loose, the generator may directly supply power to the computer board, causing it to burn out.

[LukasLynn]

Previously, my car's onboard computer malfunctioned, and the symptoms were quite noticeable. The engine warning light stayed on, with the yellow light flashing as if reminding me. Starting the car was particularly difficult, with several failed ignition attempts, which was extremely frustrating. The idle was unstable, and the engine shook violently while driving, making the car feel like it was vibrating. Fuel consumption also unexpectedly surged—originally, a full tank would last a week, but now it was gone in just three days, indicating a problem with the computer control. The transmission shifted roughly, especially at low speeds, as if it was stuck. On the highway, pressing the accelerator resulted in weak acceleration and poor power output, which was quite alarming. The car might have entered limp mode, allowing only slow-speed driving. Ignoring these small signals could lead to sensor misreporting data and damaging other components. I promptly took it to the repair shop, where they diagnosed and fixed it using a computer, costing a few hundred dollars but preventing greater losses. In short, paying attention to these symptoms can ensure safety.

[Cathy]

I've been driving for many years and have encountered situations where the onboard computer malfunctioned, with various symptoms. The engine warning light staying on is the primary signal. Starting issues are prominent, with ignition failures or requiring multiple attempts to start. At idle, the car shakes like an earthquake, with noticeable abnormal vibrations. Fuel consumption inexplicably increases due to the computer's control malfunction leading to fuel wastage. The transmission shifts roughly, causing jerks that affect driving smoothness. While driving, there's a noticeable loss of power, especially when accelerating uphill. Once it fails, the vehicle may operate in a speed-limited safety mode. Ignoring it can trigger a chain reaction, such as incorrect data damaging the engine or sensors, with repair costs starting from several thousand. I recommend checking diagnostic codes; a professional scan can quickly pinpoint the issue. Addressing it promptly saves costs and extends the vehicle's lifespan.

[CalebAnn]

Last time my car had an onboard computer malfunction, the symptoms were clearly visible. The engine light remained persistently lit. Difficulty starting required multiple attempts. Unstable idling with strong body vibrations. Sudden increase in fuel consumption with high gauge readings. Transmission shifts exhibited hesitation. Insufficient power output with sluggish acceleration. Repair promptly when these signals appear, otherwise damage may escalate.

[Harriet]

When driving an old car, I often worry about computer malfunctions, which manifest in many ways. For example, the engine warning light stays on, indicating a problem. Starting the car takes longer, and ignition is unreliable. Idle shaking is noticeable, making the ride uncomfortable. Fuel consumption increases dramatically, wasting money. The transmission responds sluggishly, and gear shifts are not smooth. While driving, power decreases, affecting handling. It may trigger a safety mode that limits speed. After repairs, driving returns to normal. It is recommended to regularly check the computer's health.