Rislone Cat Complete 44720 – 425ml Catalytic Converter & Emissions System Cleaner bottle

How to Fix a Clogged Catalytic Converter in Indian Cars Without a ₹15,000 Garage Bill

August 3, 2026

Your check engine light isn't always a ₹15,000 garage bill waiting to happen. Sometimes a ₹1,200 bottle of catalytic converter cleaner is all it takes to pass emission tests and restore the performance your car has quietly been losing for months. If your Maruti Swift has been feeling sluggish lately, your Honda City just failed its PUC check, or you've noticed a faint rotten-egg smell from the exhaust of your Hyundai Creta, your catalytic converter is very likely partially fouled. A quality catalytic converter cleaner in India can fix it before you ever need to visit a workshop.

In this article, you will learn:

What a catalytic converter cleaner actually does and why Indian driving conditions make it a near-essential maintenance item
How to use Rislone Cat Complete step-by-step in your petrol car under Indian conditions
Whether a catalytic converter cleaner can genuinely help you pass India's PUC emission test
How to know when a cleaner is enough — and when you truly need a replacement

What Does a Catalytic Converter Cleaner Actually Do — and Do Indian Cars Really Need One?

Your car's catalytic converter sits in the exhaust pathway and uses precious metal catalysts — platinum, palladium, and rhodium — to convert toxic gases like hydrocarbons (HC), carbon monoxide (CO), and nitrogen oxides (NOx) into harmless carbon dioxide, water vapour, and nitrogen. It works best at high operating temperatures, typically above 400°C. The problem? Indian urban driving rarely lets it get there.

If you commute daily on Delhi's Outer Ring Road, Bengaluru's notorious Hosur Road, or Mumbai's Western Express Highway during peak hours, your engine spends long stretches idling or crawling in stop-and-go traffic. During this time, the catalytic converter never reaches its optimal working temperature. The result is a slow accumulation of carbon deposits, sulphur compounds, and unburned fuel residues on the catalyst surface — a process that silently chokes your converter over months and years of city driving.

This is not a rare edge case. It is the everyday reality for millions of Indian car owners who drive petrol cars in metro cities. And because India's Pollution Under Control (PUC) certification system has grown significantly stricter under BS6 (Bharat Stage 6) norms — enforced nationally since April 2020 and broadly equivalent to Euro 6 standards — even a moderately fouled catalytic converter can push your tailpipe emissions above legal thresholds. This can trigger a PUC rejection or an OBD fault code on your dashboard.

A catalytic converter cleaner works by introducing a concentrated blend of detergents and chemical agents through the fuel system. As the treated fuel burns, the cleaning agents travel through the combustion chamber and into the exhaust. They dissolve carbon and sulphur deposits from the catalyst surface, oxygen sensors, and exhaust passages. Think of it as a deep-clean for your entire emissions system — done in a single tank of fuel, without removing a single bolt.

The featured product at naredi.in — Rislone Cat Complete (Model 44720, 425ml) — is specifically formulated to clean the catalytic converter, oxygen sensors, fuel injectors, and the complete exhaust emissions system in a single treatment. That means you're not just cleaning one component; you're addressing the entire chain of parts that determines whether your car passes its next PUC test or triggers a check engine light. For a car like the Hyundai Creta petrol — which sees long idle times in city traffic and is especially prone to catalytic converter fouling — this kind of comprehensive catalytic converter cleaner treatment is far more effective than a basic fuel injector cleaner alone.

Pro Tip: If your check engine light is on, use a scan tool like the BlueDriver Pro OBD2 Scanner to read the fault code before buying any cleaner. Codes like P0420 (catalyst system efficiency below threshold) or P0136 (oxygen sensor circuit malfunction) are exactly the scenarios where Rislone Cat Complete is designed to help. Knowing your code means you treat the right problem the first time.

How to Use Rislone Cat Complete in Your Petrol Car (Step-by-Step for Indian Conditions)

Rislone Cat Complete – Catalytic Converter & Emissions Cleaner 425ml

Will a Catalytic Converter Cleaner Help You Pass India's PUC Test?

This is the question most Indian car owners are really asking — and the honest answer is: yes, in many cases, it genuinely can.

India's PUC (Pollution Under Control) certificate is a mandatory document for every registered vehicle, checked at fuel stations and enforced during traffic inspections. Under BS6 norms, the emission limits for petrol cars are considerably tighter than the older BS4 standards. There are stricter thresholds for NOx, hydrocarbons, and CO. A partially clogged catalytic converter that might have scraped through a BS4 PUC check can now comfortably fail a BS6-era test. For urban car owners in Delhi, Mumbai, Pune, and Chennai — where PUC checks are frequent and enforceable — this is not a theoretical concern. It's a real, recurring expense and inconvenience.

Many car owners have found that a single treatment with a quality catalytic converter cleaner India residents can buy online resolves a borderline PUC failure without any workshop involvement. This is especially common for owners of a Maruti Suzuki Swift with high urban mileage, or a Honda City used daily in Tier-1 city traffic. The failure in these cases is typically caused by deposits fouling the converter's catalyst surface — not by a physically damaged or melted converter core. Clean the deposits, restore catalyst efficiency, and your emission readings return to compliance.

That said, a cleaner is not magic. If your converter has been running partially blocked for a very long time, or if your engine has an underlying issue — burning oil, a misfiring cylinder, a leaking injector — those root causes need to be addressed separately. A catalytic converter cleaner fixes fouling. It does not fix mechanical damage.

If you want to track exactly how your emission-related fault codes respond before and after treatment, the BlueDriver Pro OBD2 Scanner lets you read and clear codes from your phone. It's a genuinely useful tool to keep in the glovebox of any BS6 vehicle.

When to Use a Cleaner vs. When to Replace Your Catalytic Converter Outright

Not every catalytic converter problem can be solved by a cleaner — and being honest about this distinction will save you both time and money. Here's how to tell the difference:

Use a catalytic converter cleaner first if:

Your check engine light came on recently and you've had no previous warnings
You notice reduced fuel efficiency and slightly sluggish throttle response — common in city-driven petrol cars like the Hyundai Creta after 30,000–40,000 km of urban use
You detect a faint rotten-egg or sulphur smell from the exhaust — a classic sign of sulphur deposits on the catalyst surface
Your PUC test shows borderline readings, not a catastrophic failure
Your OBD code is P0420 (catalyst efficiency below threshold) with no other active fault codes
Your car is under 100,000 km and has been regularly serviced at authorised service centres like Maruti Suzuki's authorised service network

Consider a replacement if:

You hear a rattling sound from underneath the car — this typically indicates a broken catalyst substrate inside the converter shell, which no cleaner can fix
Your OBD scanner returns multiple codes simultaneously, including misfires and fuel system faults alongside the P0420 — the converter may be damaged by upstream problems
You've already completed two or three cleaner treatments with no improvement in performance or emission readings
Your mechanic physically inspects the converter and confirms a blocked or melted core

Keep in mind that replacing a catalytic converter in India typically costs between ₹8,000 and ₹45,000 depending on the vehicle. OEM units for cars like the Honda City or Maruti Swift sit at the higher end of that range. Against that backdrop, a bottle of catalytic converter cleaner available in India through naredi.in is an extraordinarily low-cost first step. It costs a fraction of even a basic workshop diagnosis, let alone the replacement itself.

While you're maintaining your car's emissions health, it's also worth keeping an eye on other fluid-related wear. If your power steering feels heavy or you've noticed fluid seepage, the Rislone Power Steering Stop Leak & Seal Conditioner is a similarly cost-effective fix. And if your car runs hot during Indian summers or you suspect a slow coolant leak, the Rislone Liquid Aluminium Stop Leak is worth adding to your maintenance kit before the next season hits.

Struggling with a borderline PUC failure or a P0420 check engine code? Here's the fix.

If sluggish performance, a sulphur smell from the exhaust, or a failed PUC test brought you here, Rislone Cat Complete (425ml) is the lowest-cost, zero-effort first step before you book a workshop appointment. Order directly from naredi.in — with Cash on Delivery available across India, free shipping, and a GST invoice included with every order. No garage visit, no appointment, no guesswork. Just pour it in, fill up, and drive.