EZ PASS Emissions Treatment catalytic converter & O2 sensor cleaner — 16 fl oz, pre-smog test fuel additive

This concentrated 16 fl. oz. formula is formulated to work through the fuel system during normal driving, targeting carbon deposits and exhaust-system buildup that can interfere with catalyst efficiency and oxygen sensor readings. EZ PASS is intended as a preventative and pre-inspection treatment to promote cleaner combustion and improved fuel-system cleanliness; results vary with vehicle condition.

How do I use EZ PASS to prepare my car for a smog test?

Add the entire 16 fl. oz. bottle to a full gasoline tank, then drive at highway speed for 10–15 minutes with the engine fully warmed so the treatment can circulate through the fuel, combustion chamber, and exhaust. This single-step method is designed for convenience and quick pre-test preparation.

• Pour one bottle into a full tank (treats up to 16 gallons).
• Drive 10–15 minutes at highway speed with a warm engine.
• Use just before smog or emissions inspections for best chance of improvement.

What parts of the emissions system does this product target?

EZ PASS works via the fuel stream to reach and help clean the combustion chamber, fuel injectors, catalytic converter substrates, and oxygen sensors. By reducing carbon and exhaust deposits, it aims to help these components operate closer to factory performance—when used on vehicles without severe mechanical damage.

• Combustion chamber: helps remove carbon leading to more complete burn.
• Fuel injectors: assists in clearing deposits for improved spray patterns.
• O2 sensors and catalytic converter: helps reduce residue that can affect sensor readings and catalyst flow.

How often should I use it for maintenance and what results can I expect?

For routine care, add EZ PASS every 2,000 miles to help maintain cleaner fuel-system components and combustion. Expect outcomes to vary by vehicle age, maintenance history, and the extent of existing deposits; heavily worn or physically damaged catalytic converters cannot be restored by additives and may still need professional service.

• Maintenance interval: every 2,000 miles for ongoing support.
• Immediate pre-test use: single 16 fl. oz. treatment before inspection.
• Limitations: not a fix for mechanical damage or severely degraded catalysts.

Will EZ PASS clear emissions-related trouble codes?

EZ PASS is formulated to assist with some emissions-related diagnostic trouble codes that stem from reduced catalytic efficiency or oxygen sensor contamination when deposits are the cause. If codes are caused by wiring faults, sensor failure, or physical damage, scanning and repair by a technician will still be required.

• Helps address codes tied to sensor contamination and catalyst inefficiency.
• Not a replacement for diagnostics or repair of electrical faults or damaged parts.
• Use with a clear service history for the best chance of code improvement.

Who is this for? EZ PASS™ Emissions Treatment is aimed at drivers who want a simple, single-dose solution to support emissions system cleanliness and potentially improve smog-test readiness. It suits routine maintenance users, owners preparing for an inspection, and drivers seeking to help reduce carbon buildup through periodic fuel-system care. Do not rely on any additive as a cure for broken or severely degraded emissions hardware; consult a mechanic for mechanical repairs or component replacement.