Can Fault Codes Still Be Detected After Being Cleared?
2 Answers
Fault codes are generally stored. Additional information: 1. Passenger cars are primarily designed and technically characterized for transporting passengers and their personal belongings and/or temporary items, including the driver's seat, with a maximum of 9 seats. 2. Passenger cars are divided into the following 11 types. Mainly including: standard passenger cars, convertible passenger cars, luxury passenger cars, compact passenger cars, roadsters, hatchback passenger cars, station wagons, multi-purpose passenger cars, forward control passenger cars, off-road passenger cars, and special-purpose passenger cars. 3. Commercial vehicles are designed and technically characterized for transporting people and goods, and can tow trailers, but do not include passenger cars. Mainly including: buses, semi-trailer tractors, and trucks.
I've been repairing cars for over a decade and seen too many car owners who think clearing the trouble codes means the problem is solved. In reality, whether the fault codes can be detected again after clearing depends on the specific situation. If the root cause isn't addressed - like when a sensor is genuinely faulty - the warning light will come back on within just a few kilometers after clearing. Modern advanced diagnostic tools can read historical fault records, just like a car computer's notebook. Even if current trouble codes are cleared, repair shops can still check what issues were previously reported. Some hidden faults may even require driving for half an hour before triggering the system detection again. So don't just clear codes for convenience - thorough troubleshooting is essential. My advice is to drive several dozen kilometers for testing after clearing codes to ensure the problem is truly resolved.
