Cataclean Fuel Exhaust System Cleaner Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters DPF Filters and

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 come back on and there are no pending codes. I am sure this stuff won’t fix every catalytic unit. In Given the cost of a new catalytic unit, this is a bet worth taking. Read more

I own a 2014 GMC Acadia SLT. The car had been running rough over the last several months. Hard shifting when accelerating, intermittent mass flow air sensor check light, skips at low speed. I took the car to my mechanic and he said my catalytic convertor was clogged. Replacement cost for a new CC was over $1000. I didn't want to just remove the CC or buy a new one so I investigated alternatives. I found this product while watching some YouTube repairmen. I was skeptical but tried it. Amazing turn around! Engine runs much smoother with no hard shifting. No skips or check engine lights. Very happy with the results, works as advertised. Read more

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. Read more

So I had a P0430 check engine light code trigger on a G63 AMG Mercedes. The P0430 code means that the catalytic converter on Bank 2 of your engine is not operating efficiently, which leads to an increase in harmful emissions. This code is triggered when the vehicle's computer detects that the catalytic converter is below the required efficiency threshold, often indicated by a check engine light. Common causes include a faulty catalytic converter, but issues with oxygen sensors, exhaust leaks, or engine problems like misfires can also cause this code. I used this product exactly as directed in combination with Rayhong boost up catalytic cleaner also on Amazon with super unleaded refill and after about 50 or so miles. Chrck engine light went away. Hopefully will last, I will update if not. So far, very happy! Read more

I don’t usually leave reviews, but this stuff genuinely worked for me. I have a 2011 Honda CR-V that started throwing a P0420 “Catalyst System Efficiency Below Threshold” code about a year after replacing both O2 sensors. I was dreading having to replace the catalytic converter, but decided to try Cataclean first. After adding it to the tank and driving normally for a few days (mix of highway and city), the check engine light went off and has stayed off for over a week now. My scanner shows all systems ready and no pending codes — first time that’s happened in since the check engine light came on about 2 weeks ago. I didn’t expect much from a bottle of cleaner, but I’m genuinely impressed. It seems to have helped clean out the catalytic system enough to restore proper readings and I passed emissions yesterday. I’ll definitely use it again as preventive maintenance every few oil changes. Highly recommend trying this before spending thousands on a new cat! Read more