Need some advice

2007 Prius started losing power got engine codes for bank 1 lean and throttle body intermittent high voltage. Replace throttle body, cleaned MAF sensor, replaced PCV valve, replaced spark plugs. Car seemed to be running fine. Drove it for 2 days and it started bucking and I got misfire on cylinder 4 code. Does this sound like coil, fuel injector? Car has around 240,000 miles. It is daily driver, just to keep miles off my truck and cheaper. Just don’t want to sink a bunch of money into it, but willing to sink a little. Any advise would be appreciated.