Four Wheel Logic

Can You Pass Emissions With The Check Engine Light On? | Why It Usually Fails

No, a lit malfunction indicator lamp usually means the car’s OBD system has flagged an emissions fault that inspectors can read. If your check engine light is on, your odds of passing an emissions test are usually poor. In most 1996-and-newer gas vehicles, the inspection station plugs into the car’s OBD-II system, reads the trouble

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