It did nothing on a Ford Fiesta! Maybe it's not the product's fault but I didn't see any difference and the warning light remained on

Guilietta 2017, diesel. No difference in consumption, no difference in performance. The lambda sensor light turned off after 20 km and turned on again after 50. Basically, a waste of time.

it does the job, for example I passed the MOT and it showed zero emissions on a nearly 30-year-old Nissan Primera. don't expect miracles though.

Excellent! Used on a Toyota Yaris 2007 with 200,000km, the check engine light had come on and it was showing an error for slow catalytic conversion. After using half and half the quantity in 2 consecutive refuels and with all the kilometers driven within Athens, the indicator turned off by itself. The car definitely performs better! I didn't notice anything significantly different in fuel consumption. I will definitely use it again even without the indicator.

Simply perfect! Difficulty starting and idling when the engine is cold. Supposedly, they had changed my lambda sensor a year ago, but I really doubt it because the problems didn't stop—professionalism at its best. In a desperate attempt after so much hassle and expense, I used it in combination with 100-octane V-power and the miracle happened, the car's behavior changed completely. However long its effect lasts, it's worth the money.

very good product I saw some difference in the car

It really does a very good job. I put it in my 2004 Audi A4 and took a 150-kilometer trip. The car's behavior changed clearly for the better. My problem was the well-known P0420 fault with the engine light on. After the trip, I turned off the light. I went on a 350-kilometer journey and everything worked correctly with the light off, with very good engine performance and fuel economy. I recommend it.

Good product, does its job perfectly, I saw a difference in the performance of my car's engine HYUNDAI GETZ 1.3 2004, I highly recommend it.

Excellent product combined with 99-100 octane gasoline, the lambda sensor light hasn't turned on for a month now

The sensor light continues to turn on with the same frequency as it did before (because I turn it off). The three stars are for the improvement in the machine's performance, which is noticeable.

I have used several additives.
For the first time (knock on wood) the check engine light has not come on. Also for the first time I noticed a significant reduction in consumption.
Suzuki NGV model 2009 with 220,000 km.
Consumption dropped from 11 to 10.2.

(However, a little while ago I also added an injection cleaner from another well-known brand.)

The car is a Fiat Sedici (twin of the Suzuki SX4) with the M16A from Suzuki (1.6 gasoline) and 350,000 km, the catalyst was changed last year and has only 10,000 km, **but the light for P0420 was coming on periodically** for the last two months. 200ml was used for about 40 liters of gasoline, and approximately 350 km were driven (250 on the highway, 100 in the city "on - off"). The light went off, and it remains off after an additional 300 km. I hope it stays that way for a while longer; otherwise, the rest of the fluid will be used.

Used in Suzuki Wagon R+ 2004 1.3 gasoline. During a diagnostic check, the well-known code P0420 appeared, indicating a permanent catalyst failure. I felt the car was sluggish and not pulling. I used the entire bottle, filled up with 100 octane, and did not turn off the check engine light to see if it would work. Today, 10/15/2024, the check engine light turned off after 820 kilometers on the highway (120-130 km/h) and in the city. It does its job, just fine! I recommend 1 bottle every 3 months

It does what it promises, chemical cleaner is not mechanical, if you have a burnt lambda or catalyst it will not fix it by magic...

I will give it 3/5 because I don't know if it worked. However, during use, the car kept stalling constantly, making driving difficult.

In trouble code P0420 - catalytic converter efficiency below acceptable threshold, it did not pass. I will investigate further the car maybe due to misfires, vacuum leaks from the intake manifold or some sensor related.

The Protec P1180 was used on a Fiat Punto Evo 1.4 (2010-120000km) & VW Passat 1.8T (2005-180000km) after an oil change using the Protec P1001 for internal engine cleaning and then the Protec P2233VIC was also used. The engines in both cars purr differently and you can immediately tell. The Fiat had a problem with the multiair system and the dealership was asking for 1800€ for repairs, but a used car dealer recommended these products to me because he uses them too, and yes, the warning light on the Fiat went off, no problem.

I used it on a Smart 451 atmospheric 1000cc. It triggered the check engine light with the error "P0422 Main Catalyst Efficiency Below Threshold". The catalyst has been replaced with an aftermarket one with less than 100,000 kilometers.
I poured more than the instructions said (half a bottle) into the tank and filled it with 100 octane gasoline (or preferably 98 octane) after several kilometers and clearing the error code with the diagnostic tool, the check engine light did not come back on.
Also, by using gasoline from a specific gas station (to mainly protect the car), I noticed a significant decrease in fuel consumption. Obviously, the product cleans and does its job.
Finally, I just want to emphasize that the check engine light with the catalyst error came on a few kilometers after refueling from a gas station of questionable quality, where the vehicle's fuel consumption had also changed.

I used it on my BMW E46 320, the check engine light was on and my mechanic told me it was a lambda fault. I installed this specific product and after driving it for some kilometers, intentionally covering long distances, it disappeared! Since then, I installed it again as a precautionary measure, it really did the job and I didn't expect to solve it so cheaply!

Opel Astra h, 2004 model 1600 cc, at 176,000 km the engine light came on, a fault in the second sensor before the catalytic converter. I asked about this product, opinions were divided, before changing the sensor, I bought it, I put the whole bottle in a 50-liter tank with 100-octane gasoline. After 400 km, the light went off on its own, I couldn't believe it, I assumed I was going for a sensor.

When I first tried it, it was good. I noticed a difference in responsiveness. But now, after a month, I can't say that I see the same level of responsiveness. It feels somewhat clogged

I used it together with the Protec Dpf Catalyst Cleaner and it did the job. I have driven 400km and the light has not come on again.

I threw a bottle into a full 35-liter tank, I did it twice, the catalyst has 345,000 km, the car unclogged and there seems to be a big difference, as for the lights, guys, they don't always turn off so easily, maybe you have a faulty sensor but even after changing the sensor, the light still comes on and the consumption has also changed, I took it to a friend who is an electronic car brain specialist, etc., who explained to me that even if you change the sensor, the brain needs to be adjusted in the computer to read correctly and he fixed it and it burns normally again, I took it to 2 repair shops and they told me various things like my light is on, etc., it's good to check how much your car is burning, only then will you understand what's going on...

After using the product, with the combination of Carbon cleaning (hydrogen cleaning), the indicator light remains on with damage to the catalyst. I need to find another way to solve the problem. As for the performance, I don't know, I haven't noticed anything different. I will try it again, maybe it needs a second dose, we shall see!

Unfortunately, 1 star after 1.5 months and two bottles, the catalytic converter light came on again. The good thing is that the engine became more responsive and passed the emissions test. From what I understood, it is only good for passing emissions tests

In my 2003 Rav4 car, it did absolutely nothing. The check is still on, and I didn't see any difference at all. I wouldn't buy it again.

From the result, it seems that it does its job. I applied it according to the instructions and the catalyst light did not turn on again.

It does what it promises, I don't know what it does in depth but it turns off the light from the catalyst.

Those who had a problem with the exhaust gases and the engine light turning on due to a catalytic converter issue, and in combination with a hundred percent gasoline, everything is solved... or at least it did a very good job for me! I recommend it!