刚在autozone上查了。是这样写的：

“Check Engine Light On
If light comes on while driving or remains on, your vehicle may have an
emissions or sensor problem and should be analyzed. If light flashes, the
condition is more severe and must be checked immediately to prevent
catalytic converter damage. ”
看来我的是前一种情况。这个问题修一下大约得花多少银子啊？保养时没查出这种问题
正常吗？