The wife's 2019 Highlander, V6, non-hybrid, 137k miles, started throwing EVAP codes:
P0455 Evaporative Emission System Leak Detected (large leak)
P0441 Evaporative Emission System Incorrect Purge Flow
Can clear these codes and it will be ok for a few drive cycles.
Over the weekend it added:
P0174 System Too Lean Bank 2
P117B Manufacturer Control
We started with a new gas cap as the lowest cost possible fix
But the codes are back again plus:
P0300 Random/Multiple Cylinder Misfire Detected.
So does anyone know what issue to look for with these codes? Trying not to just fire the parts cannon at it.
Did you check freeze-frame data or live data for clues?
Look up the codes at obd-codes.com and check the potential causes and troubleshooting information, with an eye to issues common to multiple codes.
