California Smog Check Inspector Practice Test

If a vehicle has been converted from diesel to gasoline, what should the inspector verify?

1. That the vehicle has a valid registration

2. That the aftermarket parts are approved

3. The emissions test results

4. The vehicle's emissions warranty

The correct answer is: That the aftermarket parts are approved

When a vehicle has been converted from diesel to gasoline, it is crucial for the inspector to verify that the aftermarket parts used in the conversion are approved. This is because the conversion process can significantly impact the vehicle's emissions systems and performance. Aftermarket components that are not specifically designed or approved for the emission systems can lead to increased emissions, noncompliance with federal and state regulations, and may even result in the vehicle failing the smog check. Therefore, checking whether the parts used are compliant with the relevant emissions standards ensures that the vehicle operates within legal limits and helps maintain air quality standards. Valid registration, emissions test results, and emissions warranties are important aspects of vehicle compliance and emissions performance, but the primary concern in this situation is ensuring that all parts installed during the conversion adhere to the relevant environmental regulations.