I wouldn't spend more than necessary on an OBD reader. If you have an Android phone, get one of these for a few quid and the free 'Car Scanner' app from Play Store.
It helped me solve a number of problems on Jap import motors over the years, but crucially a mis-wired O2 sensor, knock sensor and MAP sensor issue on my 2002 Alphard.
Good luck, let us know how you get on.
https://www.ebay.co.uk/itm/ELM-327-Bluetooth-BT-OBD2-OBDII-Car-Diagnostic-Scanner-Code-Reader-Tool-Android-/383711223971?_trksid=p2349624.m46890.l49286