P0420 appeared after I used MotorPower Care DPF Foam Cleaner — Diesel Particulate Filter & Catalytic Converter Cleaner Spray.
My Toyota Camry burns about 1 quart (1000 ml) of oil every 1000 miles and has 225,600 miles.
After using the cleaner, the P0420 light went away. However, my fuel economy dropped from 22 MPG to 20 MPG, and I now feel about a 30% loss of power when accelerating.
Before using the MotorPower cleaner, the car accelerated normally and had no slow takeoff.
Should I put another bottle in? The MotorPower YouTube video says to use up to 3–4 bottles to help clear a clogged exhaust manifold.
Should I put another bottle in?
That stuff (which I at least have never heard of) has already caused your car severe problems, why would you add more?
The MotorPower YouTube video says to use up to 3–4 bottles to help clear a clogged exhaust manifold.
No snake oil crap is going to clear a clogged exhaust system. If that product claims to do so that puts it firmly in the "scam" category.
Please provide all vehicle information requested in the posting instructions. We don't even know basic information such as the year of your Camry or how many miles it has.
@chucktobias direct foam spray to oxygen sensor. Exhuast manifold It did get off the po420