I went for about 2+ years with a finicky front O2 Sensor on a 2002 Solara SLE V6 1MZ-FE (MCV20). No misfire though.....It would trigger the engine warning light but reset to good on the next startup. Gas mileage did go down as I have driven this car for 22 years but not to the point of expensive repair before my 300,000 mile service. The rear O2 sensor under the car is factory still and they rarely go out. As to the recent real problem(s) was a misfire started a month ago on startup in the garage due to other factors according to my repair shop. Oldish spark plugs, bad ignition wire set, and two bad direct ignition coils. My car shook with two cylinders out I thought it could be about 9 things but in reality this was not a heavy fix. Repaired now and ready to go after the 400,000 mile mark.
Replaced all six coils in my Sienna at 225k miles…runs like a brand new machine 👍🏼
I went for about 2+ years with a finicky front O2 Sensor on a 2002 Solara SLE V6 1MZ-FE (MCV20). No misfire though.....It would trigger the engine warning light but reset to good on the next startup. Gas mileage did go down as I have driven this car for 22 years but not to the point of expensive repair before my 300,000 mile service. The rear O2 sensor under the car is factory still and they rarely go out.
As to the recent real problem(s) was a misfire started a month ago on startup in the garage due to other factors according to my repair shop. Oldish spark plugs, bad ignition wire set, and two bad direct ignition coils. My car shook with two cylinders out I thought it could be about 9 things but in reality this was not a heavy fix.
Repaired now and ready to go after the 400,000 mile mark.
Awesome! Thanks for watching!!