2010 Mazda MAZDA3 Engine Problems

“Within a week after purchasing my 2010 Mazda 3 s sport sedan in october, 2018 from a used car dealer in midvale, ut, the check engine light came on. Using a code reader, I consistently get a code of p0421, which indicates that the catalyst efficiency is below threshold. I have had 3 auto repair shops look at my car, and they all say that the catalytic converter is not operating properly and needs to be replaced. …”

“The Mazda dealer did not have the equipment to make the harness fix. I continued to drive my car and one day, my car had loud roaring sound. Within a couple days later, it began to emit white smoke from under hood and black smoke from tailpipe and begin to lose power on freeway off-ramp. I coasted to bottom of off ramp. Then I was able to restart it to move it to a nearby kaiser lot adjacent to exit ramp. From there, I had it towed home and have not driven it since.”

“Has I was driving my car home from work. Driving about 35mph I started to loose power and then the at, engine, tcs/dsc lights all came on. When I made it home I let it sit. While I looked into the issue on google later that evening I went back to see if my car was still having the issue. I placed the car in reverse and my car jumped/ jerked real hard. As I let go of the break I noticed my car didn't slowly move on its own like prior. I actually had to press the gas down quite a bit. My car revved up to 3 making a loud noise. The car had no power would hardly move. …”

“There is a recall applicable to my vehicle which requires that engine mounts be stablilzed. It makes my car vibrate and the engine sounds loud while seated in the vehicle. I have taken my car to a couple of dealers and they say they don't have the required part. I was scared to drive my car.because it was smoking from under the hood. I let it sit in my garage since 2008. I finally took it to a mechanic who told me that the engine had caused a hole in the coolant tank and it was leaking coolant. That's why it overheated. The car runs fine now, but needs to have the engine mount put in. …”

“On two separate occasion that were several months apart from one another, my vehicle has shut off while I have been driving. On both occasions I did not touch the key in the ignition in any way. There were no bumps or drastic changes in the driving conditions. The steering on the vehicle locked up and I had to hurry to get it start again. Both incidents I was actively driving on city streets. I was on a 45 MPH road the first time and a 35 MPH road the second time. I have no idea what caused the issue but it has happened twice for no apparent reason at all. …”