What causes the C102D00 tire pressure warning?
2 Answers
When the tire pressure warning light is on, it indicates that there is an excessive deviation in the pressure of the four tires or insufficient air, meaning there is an issue with the vehicle's tire pressure that requires immediate inspection. Below is relevant information: Tire puncture: This situation usually involves a very slow leak, making it difficult to immediately identify which tire is affected. You can use a tire pressure gauge to measure the pressure: front tires at 2.3 bar and rear tires at 2.5 bar. If the pressure is low, inflate the tires to the correct level and then monitor the tire pressure warning light. If the light comes on again after a few days, it is necessary to remove the tire for inspection. Excessive tire pressure: According to international standards, the inflation pressure for car tires should meet the requirements listed in Tables 1-15: standard tires: 2.4-2.5 bar; reinforced tires: 2.8-2.9 bar; maximum pressure: should not exceed 3.5 bar. Therefore, if any tire exceeds 3.0 bar, it can also trigger the tire pressure monitoring light to turn on.
When the C102D00 tire pressure warning appears in my car, I suspect it's mostly due to genuinely low tire pressure. I remember once when the weather turned cold, my tire pressure dropped noticeably, and the system immediately triggered this warning. Of course, it might not always be a simple pressure issue—for example, the sensor battery could be running low. Many car sensors last several years, but once they reach their lifespan, they tend to fail. Or, if the sensor housing is damaged and water gets inside, it might give false alarms. Another possibility is a system error, like when tire temperature rises after high-speed driving, making it think the pressure is low when it's actually normal. In such cases, I recommend pulling over immediately to check the tire pressure manually with a gauge, referring to the ideal values on the sticker by the door. If the pressure is normal but the warning persists, try pressing and holding the reset button under the steering wheel a few times to recalibrate the system. If that doesn’t work, you might need to replace the sensor or visit a shop to inspect the wiring, as aging circuits can also cause communication failures. Don’t delay too long—low tire pressure accelerates wear, affects braking, and increases the risk of a blowout. Regularly checking pressure and maintaining sensors can prevent many issues, especially during seasonal changes when temperature fluctuations are more likely to cause problems. Personally, I’ve developed a habit of checking monthly.
