如果registration延期时候需要smog check的话, 你早晚也得修.
Check Engine Light Off - Make sure your vehicle's Check Engine Light or
Malfunction Indicator Lamp is not illuminated. A constantly illuminated
Check Engine or MIL light is an automatic smog failure. A certified
repair shop can diagnose the check engine light condition and offer you
an evaluation and estimate. The home mechanic may also diagnose a Check
Engine light malfunction via special Check Engine codes retrieval tools,
available at most auto parts