Will custom modifications like a flat bed pass safety inspection?
Vehicle modifications and emission monitor readiness issues can cause unexpected failures during official safety certifications. When sensors like the catalyst, evap system, and O2 sensor show as not ready, or when custom parts like a homemade flat bed are installed, owners struggle to determine if their vehicle will pass inspection.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Consulting local inspection guidelines
- 2Asking mechanics for opinions on legality
- 3Completing a specific drive cycle
- 4Checking sensors at an auto parts store
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
r/MechanicAdvice2 people · September 2026
“Will a pickup truck that has a custom/homemade flat bed have any issues passing Ontario safety certification?”source ↗
Ten_Lug_Thug · r/MechanicAdvice · 2 upvotes
Where this came up
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