Is it normal for the tachometer to show 1 when parked?

[DiTalia]

It is normal for the tachometer to show 1 when parked. Here is some additional information: 1. How the tachometer works: It processes the received digital pulse signals (sent by the sensor) and directly reads them into the CPU's counting port. The software then calculates the speed and the corresponding position of the pointer, which is then amplified through the CPU's control port to drive the stepper motor to rotate in positive and negative directions, indicating the corresponding speed value (the pointer is directly installed on the rotating shaft of the stepper motor). Each step of the stepper motor is only 1/3 degree. 2. Advantages of the tachometer: Large static torque makes the pointer less prone to shaking, and it has strong anti-vibration performance. The use of a single-chip microprocessor through software design ensures high precision and strong anti-interference capability. The hour meter uses LCD display, with no mechanical parts, making it more reliable and modern.

[Eileen]

I drive to and from work every day these years, and when parked, the tachometer stops at 1, which is around 1000 RPM. I think it's quite common, especially if the engine has just started and the weather is cold, the RPM might be a bit higher, which is normal. Once the car warms up, it will drop to around 600 or 700 RPM. However, if the car is parked, the temperature is normal, and it still shows 1, it might be a bit high, like the throttle is a bit dirty or the air filter is clogged and hasn't been cleaned. These minor issues can be checked by yourself by referring to the user manual or finding some free time to ask at a car repair shop. Usually, higher idle speed also means more fuel consumption, possibly costing an extra few tens of dollars in fuel per month, and in the long run, it can damage engine components. I once experienced high RPM and found out the spark plugs were old, and replacing a pair fixed the issue.

[DeWilliam]

As someone who frequently tinkers with engines, when the tachometer shows 1 at idle, it indicates 1000 RPM. Most modern vehicles are designed to idle around 800 RPM, so 1000 RPM is slightly high but still acceptable, depending on the specific engine type—turbocharged engines might idle a bit higher. The cause could be carbon buildup in the intake system affecting idle regulation or ignition timing calibration errors. It's best to plug in an OBD diagnostic tool to quickly check the data. If the idle remains consistently high, it may impact power smoothness and accelerate wear. For routine maintenance, I recommend cleaning the throttle body and inspecting vacuum lines every six months. These tasks are inexpensive and can be DIYed to avoid costly overhauls. Idle stability affects overall driving experience and component lifespan—keeping it within the proper range is key.

[DeLeah]

I'm particularly concerned about driving safety. When parked, the tachometer shows around 1000 rpm. Although manufacturers generally claim this is within the normal range, a higher reading indicates unstable idle speed, which may lead to sudden stalling—especially dangerous at traffic lights. It's recommended to first observe whether the RPM drops after the engine warms up. If not, promptly check the idle speed control system for faults, such as a damaged solenoid valve or sensor malfunction, which can easily cause unreliable power output. This is particularly risky when parking on slopes, as it may lead to vehicle rollaway. For a simple daily test, you can rev the engine in neutral to check responsiveness. If it's sluggish, seek professional diagnosis to avoid minor issues escalating into major problems. Ensuring your safety and that of others is more important than saving fuel.