If the EIS displays 'sample dilution', what is the proper action for the inspector?

If the EIS displays 'sample dilution', what is the proper action for the inspector?

• A. Proceed with the Smog Inspection if the probe can be safely inserted at the exhaust leak location without damaging the vehicle.
• B. Stop the inspection and replace the probe before proceeding.
• C. Recalibrate the EIS and then continue testing.
• D. Ignore the message and continue testing.

Answer: (A)

When you see a sample dilution message, it means air is getting into the sampling path and the reading could be biased because the probe isn’t drawing a true exhaust sample. The proper action is to proceed with the Smog Inspection only if you can safely insert the probe at the exhaust leak location in such a way that you sample the actual exhaust stream without causing any damage to the vehicle. This ensures the reading reflects the engine’s emissions rather than ambient air. Recalibrating won’t fix a leak-related dilution, ignoring the message is unsafe, and if you can’t achieve a safe, proper seal, you should address the leak or stop rather than continue with a faulty sample.

When you see a sample dilution message, it means air is getting into the sampling path and the reading could be biased because the probe isn’t drawing a true exhaust sample. The proper action is to proceed with the Smog Inspection only if you can safely insert the probe at the exhaust leak location in such a way that you sample the actual exhaust stream without causing any damage to the vehicle. This ensures the reading reflects the engine’s emissions rather than ambient air. Recalibrating won’t fix a leak-related dilution, ignoring the message is unsafe, and if you can’t achieve a safe, proper seal, you should address the leak or stop rather than continue with a faulty sample.