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California drivers decode new smog rules

What’s changing: Starting October 1, 2025, all OBD II readiness monitors must be set for a vehicle to pass a smog check, replacing previous allowance rules. Why it matters: The update ensures ...
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California to enforce stricter smog checks in 2026

Stricter OBD rules: In 2026, all applicable OBD-II readiness monitors must be set for a vehicle to pass, ending long-standing exemptions. Impact on drivers: More vehicles may initially fail smog ...