I have a 2005 Honda Accord that my dad took ownership of 8 years ago (2012) at 97K miles. He passed the car onto me in 2016 with 160K miles as I was about to enter college. Around that time I noticed the engine would get hot and so we suspected that there was a coolant leak. Added those $30 coolant leak repair thing you pour into the radiator and I would just drive it and it worked fine for a year, and only occasionally have to add coolant after that. Forward a year and a half we’re almost at 180K and my parents come and visit me at college and my dad notices the oil light was on. i noticed it was on but it wasn’t very apparent to me (I knew nothing about cars) and suspect it had been on for a month or two. Turns out I had to add about 3.5 quarts just for the dipstick to register as full. In all my time of ownership I doubt I had changed the oil more than 1 or 2 times. We noticed a check engine light and my dad changed all the spark plugs and engine coils at around 185K. The car drove well for the next 8 months until I noticed that the car had a check engine light and upon coming to a stop, the engine would rev from 700-1300 rpm 2 or 3 times and then just suddenly die. I’d have to restart the engine and continue forward. When the engine is cold it doesn’t do this, and it only happens upon stopping. Freeway driving is flawless. Furthermore, the engine burns coolant like crazy now, I have to add about a gallon a week. Timing chain has never been replaced under my Dad and I’s ownership of the vehicle. The engine oil has now been regularly changed and I got a 2014 Civic (which I take immaculate care of) as my daily driver. However, I want to fix this car and make it a project car as I have really gotten into cars over the last year especially detailing, however the car is not street legal since it can’t pass emissions. Car is now at 197K miles.
I hooked up my OBD2 scanner tonight and got 6 engine codes:
P2195: 02 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1
P0171: System Too Lean Bank 1
P0301: Cylinder 1 Misfire Detected
P0302: Cylinder 2 Misfire Detected
P0300: Random/Multiple Cylinder Misfire Detected (I’m suspecting getting rid of 301 and 302 will get rid of this)
P0171: System Too Lean Bank 1 (again, for some reason)
What should my plan of action be? Thanks to all who help.