Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 5L (120009CAT)

⭐️⭐️⭐️⭐️⭐️ 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.

I used this on a Porsche Boxster with 55,000 miles. Got a “check engine” light, and the code was for the catalytic converter. Figured I had nothing to lose. Followed the directions to add to 1/4 tank of fuel, and the the code did not clear. Figured I would try another bottle. The code then cleared in about 10 miles. This was all over 1000 miles ago, the check engine light has not come back on and there are no pending codes. I am sure this stuff won’t fix every catalytic unit, but the cost of a new catalytic unit, this is a bet worth taking. Update: it’s several thousand miles later, still no problems. This stuff works!

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.

Just as advertised. 👍Although it didn't clear my check engine (P0420 code) light but I do feel a huge difference as far as my trucks horsepower. My truck runs smooth and picks up faster.

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

I got my year2000 lexus es300 check engine light (CEL) on and code is P0420, the car got 185K miles already, my inspection is coming, What I do? change a OEM catalyst converter cost me $2000. Check amazon reviews, I got this one and poured it in base on instruction. Did not work for the first 10 miles with 1/4 tank, CEL back again. After refilled the gas tank, I deleted the CEL but it back on again after 50 miles, I deleted again then it back after 100 miles. I gave up and even want to buy all parts(O2 sensors and catalyst converter), but finally it works after 150 miles, Code P0420 are gone and CEL never back on. I went to MVC and Passed inspection, Binggo! Now it is more than 200 miles and still no light on. I am so happy with this product, it is not just clear the CEL, also clear the whole fuel systems, make my car runs so smoothly. I had rough idle, it make it much better now. Gas milage is better too and engine is so smooth now, like new one. I highly recommend this one and will use it again for another few months. -------------------------------------------------------------------------------- Update: After I passed the inspection and drove about 300 miles, the CEL back again, it did not really fix the CAT issue but it does help me get passed the inspection. Before, the CEL back on only in 20-30 miles, now, hundreds miles. I reduced it to 4 star since it did not help to fix the CAT problem permanently, but it did help me passed the inspection, which is much more value than $25. so for me, it is still worth to buy and try. --------------------------------------------------------------------------------- Update2: I fixed the P0420 issue, it is due to bad O2 downstream sensor,. I just replaced the down sensor for $50 (part)+ $50(labor), it fixed all, P0420 code are gone, so it is not CatClean not working but O2 sensor issue. you are not expecting Catclean can fix O2 sensor electronic issue, but it did make my idle very smooth and make the CEL on delayed, so I still bring it back to 5 Star. Hope this feedback can help others who can not cleanup code with CatClean. If your code not disappear, mostly O2 sensor issue or Cat leaking something....

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!

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.

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"

My car get the P0420 every week after clearing it with my OBD reader than I read some good reviews of this cataclean and I don't believe a single 16oz will fixed the problem so I decided to buy the 5 litres bottle instead. Poured 500ml into my tank at 1/4full (15 litres) as instructed and instead of just 15 mins drive, I drove my car for a few days to almost empty and fill it up to full tank. Is has been 2 weeks (800km) and no Check engine light so far. It is way more economical buying the 5L bottle and I intend to repeat the cleaning process every oil change.