Top positive review
30 people found this helpful
I was happily suprised when it worked for me.
on November 4, 2016
My check engine light had been on for a couple of years for the catalytic converter on my 2003 Toyota Sienna. I would clear the code and it would usually turn back on in a day or two. The vehicle seemed to drive fine to me. Every time I thought about fixing the problem I would lose interest because the estimates were around $1000 for a catalytic converter and I was told there were 3 of them in the vehicle. Someone suggested I give this product a try. I was pretty skeptical but decided for $20 I would give it a try. I added the bottle with about 4 gallons of gas left in the tank and drove it about 15 miles as instructed. I then filled the tank and drove it about another 50 miles over the course of a week. The engine light was still on so I cleared the codes and now the check engine light has been off for a month. I only used one bottle but if the check engine light comes back on again I probably would try a second bottle because it seems to have done something positive.
I know some people have said it did not work for them and it probably won't work for everyone but I wonder how many of these people followed the instructions and how many of them cleared the check engine light after applying the product. I don't think the check engine light will turn off in most vehicles until the code has manually been cleared.
Of course a few days after posting this the check engine light came back on. I probably will try another bottle.