Cataclean Fuel & Exhaust System Cleaner for Gasoline Engines – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters and Cleans Fuel Systems, 16oz - Pack of 2 (120019)

⭐️⭐️⭐️⭐️⭐️ Outstanding Experience – Highly Recommended I had an excellent experience with this vendor from start to finish. The customer service was responsive, professional, and genuinely helpful throughout the entire process. Any questions I had were answered quickly and clearly. The product quality exceeded expectations — well-made, exactly as described, and clearly built with attention to detail. It’s refreshing to receive something that not only matches the listing but actually delivers beyond it. Most importantly, the product description was accurate and reliable, which made the purchasing decision easy and gave me confidence in what I was receiving. This is exactly the kind of company I look for when shopping. I am a very satisfied customer and will absolutely continue to be a long-term repeat buyer. Highly recommended — I look forward to doing business with them again.

Purchased this product out of sheer desperation and it actually worked! My 2010 Jeep had the O2 and Cat lights stuck on the drive cycle and it wouldn't clear smog. Drove that sucker a thousand miles over two-months at varying speeds and the drive cycle just wouldn't clear. Added the Cataclean on a quarter tank and drove for about 40 miles and the O2 light cleared. Filled the tank and drove normally for about half a tank and the Cat light cleared. Breezed through the smog check on the first try and now I am good for two-years. I almost didn't buy this product because it seemed too good to be true but it worked for me. Hopefully it will work for you!

Here's the quick summary: Yes I used this and yes my car passed smog test.... but I would try lots of other things before using Cataclean again. My vehicle is a 2004 Toyota Sienna with 137,000 miles. Check engine light (CEL) has been on for two years now. The CEL is on due to the following codes P0420 - Cat Bank 1, P0430 - Cat Bank 2 , P2238 - AF Sensor Circuit. This year we got the registration renewal and were required to get a smog certificate. Since you can't pass smog test with CEL on, we took the van to the dealer to see about getting it the CEL fixed. The dealer recommended replacing both catalytic converters the A/F sensor and calibrate ECM. All for a cost of over $2,800. So instead of spending the $2,800 I figured it was worth it to give Cataclean a try. I followed the directions and added the entire contents to about 1/4 tank of gas. Then immediately drove the van until it was empty. The van was not completely empty, but the yellow fuel warning light did come on and the gauge was on E. At this point I filled up the tank with premium gasoline. After filling it I immediately drove the van for about 40 miles. I was expecting the CEL to turn off but it did not. At this point my story gets less normal than most I suppose. My wife drives this van most times and I have another car. It just so happened that my wife was sick with a bad case of the flu and she did not drive the Sienna for more than 1 week. So the Sienna sat with nearly a full tank of fuel and whatever was left of the Cataclean for 1 week. After 1 week of sitting in the garage, I decided it was time to try to drive the van and see if the CEL would turn off. This is where it gets very weird and discouraging and expensive. I pulled out of the garage and the van barely ran at all. It felt like only half of the engine was running. The engine had very little power and to make matters worse the CEL was now flashing ON and OFF. I pulled over and did some quick research on my phone and found out that a flashing CEL is bad news. I spent the next 4 hours "babying" my car. I would drive it for a little bit and the CEL would flash. So I would pull over and let it idle next to the curb. When the engine was simply idling the CEL would not flash. I did this for hours and hours and the CEL flashing got less and less prevalent. Finally the CEL stopped flashing after about 4 hours of driving and idling. If this does happen to you, you need to be very careful. Driving with a flashing CEL could lead to really expensive damage and even your car catching on fire. After that long evening of babying my car, the CEL never flashed again. But the car did not run correctly after that either. The car was rough at idle and vibrated a lot while it ran. And now, my car had a new code P0354. I took it to a mechanic and he replaced the #6 ignition coil and spark plug and cleaned the fuel injection system. This made the car run smooth and cleared the P0354 code. Replacing the ignition coil spark plug and cleaning the fuel injection system cost $510. I had a lot of expensive problems after I put in the Cataclean (see above). These problems could have been a coincidence and I could have had those problems without the Cataclean. After all, it's an old vehicle with lots of problems. Anything is possible. But I don't think I will be using Cataclean again. I cleared all codes and tried to run the monitors. For those of you not familiar, there are "monitors" which run in software on your vehicle. These monitors must be run and passed with no codes before you can have your car smogged. If the monitors generate codes, then the CEL turns ON. If you clear the codes, your CEL does go off, but your monitors are now "imcomplete" in your cars OBD memory. You cannot pass smog with incomplete monitors (actually the number of incomplete monitors allowed to pass smog varies from state to state so check with your motor vehicle department). You can find the rules for California here: [...] So now my car runs smoothly, the Cataclean has run through the emission system and the CEL is off. I have two incomplete monitors. One of the incomplete monitors is the Catalytic Converter monitor. So I then drive the van around town running some errands. Mostly stop and go, but some highway driving. After about 50 miles the CEL turns ON and generates code P0420... very discouraging. But I did not give up. I cleared the P0420 code and decided to try nothing but highway driving at moderate speed. Just a hunch I guess. So I got on the freeway and drove. Entirely freeway driving at very moderate speed. I got in the slow lane with the trucks and probably averaged 55 MPH and for it's worth I turned my Air Conditioning off. I did this for about 75 miles. I kept checking the scanner to see if the monitor for the Catalytic Converter had run, but it said incomplete. I must have checked the scanner 30 times to see if the monitor had run. Then it happened, the Catalytic Converter monitor ran and the status went to OK with no code. As soon as the monitor ran with no code I found the first smog station I could find and got a smog certificate. YEAH!!!! In order to do all of this I needed an OBDII scanner with me in the car to check monitors, read codes and clear codes. I used a very inexpensive OBDII scanner that I bought at Wal-Mart for $21. I think some of the inexpensive models offered on Amazon would work as well. You don't need an expensive scanner to do this. The main thing for checking monitors is a feature called "I/M Readiness Status"-- make sure your scanner can do this function. So did the Cataclean help pass smog? Did Cataclean cause the damage to the ignition coil? Did not driving it for a week in the middle of this process cause a problem? .... I don't know. If I were to ever need to use Cataclean again, I would drive the vehicle... a lot and try to get it through the system as quickly as I could. Hopefully, I won't need to use it again.

This is my story. My Honda Odyssey EX-L 2005 (85K miles, first owner, bought new, all regular maintenance) all of sudden had a CEL light on 11/22/2016. It threw a code of P0420 pointing at catalyst system efficiency below threshold (bank 1). Based on my research, there are too many things that can cause this code. However, if it comes to the catalytic convertor or oxygen sensor replacement, the expense could be too high. So, I decided to take care of it myself before I go to Honda dealer or other mechanics. I first changed the engine oil at Walmart, just regular Quake 5w20 oil. Besides, I asked the technician at Walmart to add a bottle of Lucas (heavy duty Oil stabilizer, white bottle) as well because the engine seems to burn a bit oil over time. I also filled the gas tank up (regular 87 gas) and added a bottle of Heet (red bottle, Heet Fuel Line Antifreeze, Water Remover and Fuel Injector Cleaner) into the gas tank to remove water and hopefully to clean the fuel injector. Then I cleared the code myself and started driving the vehicle locally. After driving about 135 miles, the engine light was on again and had the same single P0420 code. At the time, the Cataclean I ordered from Amazon arrived so I want to give it a shot. At this weekend (12/03/2016), I already drove the car for about 190 miles since I filled the gas full. I poured the whole Cataclean into the gas tank, which had a bit less than a quarter tank of gas. Then I drove on to highway. As some reviewers suggested, when there were no cars close to me, I stepped on the gas pedal hard (almost 'floored' it) to get RPM to 5K. When the RPM reached 5k, the speed of the car was about 85 miles on highway and then RPM immediately fell back below 4k and 3k itself. I released the gas pedal to slower the car. (If you do that as well, do be careful. Nobody wants to get a speed ticket on high way, right?). I did the same cycle for about 5 times on highway: slowing down to about 60 miles/hr -- flooring gas pedal to reach 5k RPM (speed over 80 mile/hr) -- releasing gas pedal to let the car slow down. After driving about 30 miles, I stopped in front of a mall to shop a while. About 15 minutes later I came back to the car and started it. You know what, the engine light was off, on its own! I drove another 40 plus miles after that and stopped at a gas station to add some fuel. I just added 6 gallons of regular 87 gas. As I do not plan to add premium gas in the future, I did not want to do it now as some reviewers suggested. With 6 gallons of fuel, I drove more than 120 miles before I filled the gas tank again. That 6 gallons of gas gave me about 21-22 miles/gallon gas mileage, which was about right for Honda Odyssey. The engine light is still off (after driving 170 miles). I felt the car was getting more power after adding the cataclean. The acceleration was smooth and more powerful. I did not observe any black smoke (or any kind of smoke) from the tailpipe when I floored the gas pedal. The car did not have any driving issue or noise or anything. I did not expect it worked so well when I did not see any smoke or anything coming out of the tailpipe. But obviously it helped clean the catalytic convertors or oxygen sensors or whatever that threw the P0420 code. I am not sure how long the code will be off and I will post a follow-up comment in the future. Again, the car has been maintained regularly for oil change, transmission flush, and I added sea foam to gas, oil gasket, and even brake air intake lines once every other year. However, the car was driven mostly local in the past 4-5 years. I can tell you, its RPM never reached 5K in the past 5 years. What causes the P0420 code? I do not know. But obviously the Cataclean did help at this time. Spending $16-20 on the Cataclean before you touch the expensive oxygen sensors or catalytic convertors could be a good investment. I plan to buy another bottle in case the code comes back again. Good luck to you DIY maintenance.

If you are facing a failed emissions test, don't give up on your catalytic converter until you try this. I recently failed my state inspection due to high NOx levels—my readings were hitting 700 PPM, which is well over the limit. After some digging, I realized my downstream O2 sensor was dirty and essentially unresponsive. How I Used It: I followed the "1/4 tank rule" for maximum concentration: Waited until my gas tank was at exactly 1/4 full. Poured the entire bottle of Cataclean in. Immediately hit the highway for a long-distance drive. Drove it hard until the gas light came on before refilling with fresh fuel. The Proof (OBD-II Data): I monitored the entire process using my BlueDriver Bluetooth OBD-II scanner. It was incredible to actually see the live data change. Over the course of that highway drive, the downstream O2 sensor readings began to stabilize and "wake up." The graph went from a flat, sluggish line to responsive, healthy signals. The Results: I went back for a re-test and passed with flying colors. My NOx dropped from that failing 700 PPM down to an average of 75 PPM. Final Verdict: This product isn't "magic in a bottle" for a physically broken or melted catalytic converter—if it’s dead, it’s dead. However, if your fuel and exhaust systems are just carbon-fouled or your sensors are too dirty to read correctly, this stuff is a lifesaver. It saved me from a $1,000+ repair bill. Highly recommended!

I'll try to make this brief. I used Cataclean once about a year ago on recommendation from a mechanic and various online sources as a stop-gap measure to keep the engine light off for enough miles to pass inspection with a P420 catalytic converter code. This also required turning off the light with an OBD scanner first, adding the Cataclean, then driving over 100 miles and resetting the I/Ms. It was successful, but I can't say if the product helped keep the CEL off or if it just happened to work out. After inspection, the CEL returned at 280 miles, which it always will, this is not a permanent fix, please understand that. Now comes the very, very bad part. This year, each time I turned off the CEL to see how long it would remain off before inspection, it came back on well before 50 miles. So I know my catalytic converter is getting worse, no way to make it one more year, it would have to be replaced. But I thought I'll give Cataclean one more try and maybe it will help keep the CEL off a bit longer before I commit to $2,000+. Cleared the code last night. Added the Cataclean, precisely as directed, 1/4 tank, etc. Started driving. Within ONE mile, massive misfires, chugging, struggling, no pickup, CEL FLASHING. I had entered a highway on ramp when it hit, managed to get up to speed at least, then exited immediately. Vehicle shaking and sputtering at stops, I put it into neutral and gave it some gas so it wouldn't stall. Drove to the nearest gas station and filled the tank to at least dilute this garbage, the best option at the time. I ran my OBD scan at the gas station, P0300 random misfires code, all cylinders reporting misfires. Cleared the code so I could see how fast it would return. I drove only around my neighborhood so I wouldn't be far from home if catastrophe struck. The CEL of course came on again in a few miles but the jerking, stuttering, shaking and struggling were greatly diminished now because I diluted the additive with premium. The problem remains, however. When the CEL came on again, at the very least it was steady and not flashing, certainly because of my quick thinking to dilute it. Now I'm in the unenviable position of HOPING it's JUST the catalytic converter that got badly clogged from the release of filth or whatever the product released into the system in the single mile I drove it after adding it to the tank. Did the research online. It could be a lot of system components affected in addition to the already weak cat. Look it up yourselves, PLEASE! This can foul your spark plugs, fuel injectors, O2 sensors. It can severely damage your cat when you have misfires, causing it to overheat and break apart. There are tons of articles about all the possible side effects of using this. I never came across them when I researched it the first time because I didn't specifically search for these side effects. All I saw were opinions that maybe it will work out, maybe it won't, but that it was safe. THIS IS NOT A SAFE PRODUCT! Look, maybe it's OK for some people - it doesn't work at all for others. A very mildly dirty cat might be cleaned enough to get through an inspection and turn off the CEL for a while longer than normal but - wow. Did I ever make a huge error using this again. Yes, nothing happened the first time I tried it. You might get lucky. You also might release so much gunk into your engine and exhaust that you destroy your vehicle to the tune of THOUSANDS. Do the research. Be smart. I poured this junk into my tank without a care in the world, thinking it would either help keep the CEL off or not and that would be it, never suspecting massive misfires and a flashing CEL. It's a holiday weekend now and I can't get to a garage until Monday. I will update this review when I learn the extent of the damage and I'm hoping it's only 2K for cat replacement. Imagine that. Think long and hard about trying this. I hope I can save some of you from the scary situation of being on the highway and misfiring and struggling to get up to cruising speed and a nerve-wracking drive back home or having to call for a tow. Consider this a public service. Get online, find out everything about this and other additives before using them!

It did not turn off my '0420 code light. It may be a good product but it did not help my situation

I must admit, I was skeptical. This seemed like a lot of money to dump in a gas tank, and hope it works... GREAT NEWS,*IT WORKS!!* I Poured it in a 1/4 tank and drove it till the light came on... It was a little smelly BUT after the refill... Reset the light... The power is up, the exhaust even has a slight growl that I hadn't heard since I bought the car. I've managed at several automotive chain stores, if I still was working with them .. I'd happily recommend this!

سيارتي من نوع GMC اكاديا موديل 2008 ماشيه تقريبا 400 الف كيلو متر . ظهرت عندي لمبة المكينة بشكل مفاجئ وقمت مباشرة بفحص الكمبيوتر وظهر عندي الكود P0420 والخاص بفشل دبة التلوث (الكتاليزر). اخطر واخبث كود وفعلا يعتبر كابوس والسبب انه سيارتي بها علبتين تلوث قيمة الواحده 6000 ريال اي انه تساوي 12000 ريال قيمة العلبتين مع ملاحظة انها اغلى من سيارتي لو بعتها في الحراج (ههههه). طبعا الشركات المصنعة مبرمجه كمبيوترات السيارات انه في حال انخفاض كفاءة دبة التلوث عن 95% في تنقية مخلفات العادم تظهر لمبة المكينة ويعطى حساس الاكسجين نسب خلط غير حقيقية للكمبيوتر وتبدأ هنا تزيد صرفية الوقود وبذلك اصبح لزاما على مالك السياره استبدال دبات التلوث رغم انها مازالت تعمل بنسب كفاءة اقل من 95% وهذا جيد للبيئة وسيئ لمحفظتي الماليه. هذه بعض النصائح التي احتسب فيها الاجر من الله مع العلم بأنني لست فني سيارات وانما قرأت الكثير عن هذا الكابوس. اولا: ظهور الكود P0420 ليس بالضرورة ان علبة التلوث معيبه , هناك بعض الاخطاء ربما تؤدي الى ظهور هذا الكود مثل ( حساس الاكسجين الامامي (قبل دبة التلوث) و حساس الاكسجين الخلفي (بعد دبة التلوث) ضعف البواجي و اتساخ مدخل الهواء وتسريبات العادم وغيرها مثل تلف جلدة غطاء تانكي الوقود وصمام EVAP الخاص بالتبخير. لذلك عليك اولا مراجعة والتاكد من صحة هذه المكونات قبل التفكير في تغيير علبة التلوث. لذلك ماقمت به اولا التاكد من كفاءة حساسات الاكسجين ولهذا الغرض استخدمت ماسح كمبيوتر السيارة من نوع OBD2- Blue driver والذي يعطي قراءة مباشرة Live لعمل الحساسات وكانت النتائج مبشرة جدا حيث ان نسب الفولتيه للحساس الاول تصل الى 0.1 v والمنحنى يعطي شكل زقزاق ثابت بين القراءتين 0.01-.01 فولت والحساس الثاني (بعد علبة التلوث) مختلف تماما عن قراءة الحساس الاول بمنحنى مستوي مستطيل بدون تذبذب حوالي 0.45 ملي فولت وهذا يثبت ان الحساسات تعمل بشكل جيد ويثبت ايضا ان دبة التلوث (الكتاليزر) غير مسدودة ومازالت تعمل بكفاءة عاليه ولكنها اقل من 95%. ولو ان قراءة الحساس الثاني مطابقة لقراءة الحساس الاول هذا يثبت ان دبة التلوث قد تلفت او مفرغة من البلاتينيوم والتيتان ويتوجب حينها استبدالها وتقبل الامر الواقع حفاظا على البيئة المحيطة بنا وعلى صحتنا. اقترح عليك عند ظهور الكود الخبيث لاول مره القيام بفحص مباشر بالكمبيوتر وتسجيل الكودات الظاهره ومن ثم القيام بمسح الكود والانتظار. اذا عاود الكود بالظهور سريعا فهذا يعني ان هناك مشكله غير دبة التلوث واذا رجع الكود وظهر بعد يوم او يومين فهذا مؤشر بأن دبة التلوث لاتعمل بشكل جيد وهذا ما حصل معي فعليا. بعد ان ثبت لدي ان دبة التلوث لاتعمل لدي بشكل جيد (كفاءة اقل من 95%) وضعت لنفسي خطة الاصلاح التالية: 1- استخدام منتجات تنظيف الدبة عن طريق خزان الوقود مثل cataclean (المنتج الحالي) رائحته مثل التنر (مذيب الدهان) وغيرها من المنتجات مثل (ليكي مولي). واذا لم ينجح هذا الخيار اطبق طريقة العلاج الثانية: 2- فتح الحساس الاول (قبل علبة التلوث ) ووضع سائل التنظيف ومن ثم تشغيل السياره ,ورفع ضغط المكينه الى 2000 RPM لمدة نصف ساعة. اذا لم ينجح هذا الخيار اطبق العلاج الثالث: 3- فتح الحساس الثاني (بعد علبة التلوث) وعزله بصامولة (سبيسر) وبذلك يعطي قراءات مختلفة عن الحساس الاول وتختفي لمبة المكينة مباشرة. اذا لم ينجح هذا الخيار اطبق العلاج الرابع: 4- ابيع السيارة والعوض على الله . لاحظ انه لم اتطرق لطرق اخرى مثل وضع سائل التنظيف في البوابة مع التشغيل لانها تحتاج الى فني متمرس لكي لايضر بجلد البلوف واجزاء المكينه الاخرى. ولا انصح بأتباع وضع جالون تنر امريكي في الخزان لانه راح يضر بطرمبة الوقود واجزاء المكينه. ولا انصح بتفريغ دبة التلوث من الرصاص لانه يضر بصحتك وصحتي ويؤدي الى صرفية عاليه من الوقود وجهد غير مبرر على المحرك. بعد مراجعات مطولة على افضل سائل لتنظيف دبة التلوث عن طريق خزان الوقود وجدت ان cataclean عليه مراجعات موثوقة ومشجعه على مستوى العالم لذلك قررت شراءة وتوكلت على الله رغم ارتفاع سعره الا انه مازال اقل بكثير من سعر دبات التلوث. ما يلي شرح للطريقة التي استخدمتها: 1-لاتمسح لمبة المكينه (لاتمسح الكود) قبل المعالجة لكي نتاكد ان المنتج فعال. 2- يتوجب ان يكون في خزان الوقود 4 جالونات امريكي (مايعادل 15 لتر من البنزين) ولا يزيد عن ذلك لكي لاتتسبب في تخفيف المنتج ومن ثم تقل كفاءته. سيارتي تسع الى 80 لتر من الوقود لذلك انتظرت مؤشر الوقود يقل عن الربع بقليل. 3- اضفت علبه واحده من cataclean الى خزان الوقود بعد ان اخذ المحرك درجة حرارة التشغيل (سخنت السيارة 10 دقائق) واحكمت اغلاق غطاء الخزان. 4-توجهت الى الطريق السريع وقدت بسرعة 120 كيلومتر بالساعه ولمدة ساعه كامل حتى اضاءة لمبة تحذير نفاذ الوقود. 5- قمت بتعبة الوقود بنزين خالي الرصاص احمر 95 6- قمت بالقيادة مجددا بنفس الطريقة حتى وصلت المنزل بعد ساعة اخرى 7- عندما وصلت المنزل (بعد قيادة ساعتين بسرعه 120 ) مازالت لمبة المكينة مضاءة مما سبب لي الاحباط. 8-اطفئت السيارة وانا اتحسر على الجهد المبذول. 9- عندا المساء توجهت الى وسط المدينه لقضاء بعض الحاجات ومازالت لمبة المكينة مضاءة. 10- عند تشغيل السيارة مرة اخرى في وسط المدينة اختفت لمبة المكينة من تلقاء نفسها (انه سحر) الحمدلله دبة التلوث الان نظيفه ونجح cataclean في رفع كفاءتها اكثر من 95%. اشعر بالسعادة الان وانا ممتن كثيرا لهذا المنتج. سوف اقوم بوضع قارورة اخرى احترازيا بعد ثلاث اشهر من تاريخ هذه المراجعه وسوف اوافيكم بالجديد في حينه . هل تعود لمبة المكينة مرة اخرى لاقدر الله ام لا. حظا سعيد لكم ولنا.

Worked as expected.

Vi buenas reseñas en internet, apenas lo coloqué y esperemos sirva. No ha vuelto a salir el error P0421, lo usaré regularmente.

I think the Cataclean did help. The fuel economy has improved and so far so good no error message has re-appeared appeared.

Muy buen producto cumple con lo que se promete en menos de 24 horas se quito el error del carro por culpa del catalizador se borro solo 100% recomendado "APROBADO POR CHAYANNE"