Toyota Highlander: Common Problems, Fault Codes & Repairs Everything for the Toyota Highlander in one place — its common problems and reliability, the fault codes owners see most, and the tools to diagnose them. Toyota Highlander fault codes Toyota Highlander P0171Toyota Highlander P0300Toyota Highlander P0401Toyota Highlander P0420Toyota Highlander P0455 Toyota Highlander specs & capacities Toyota Highlander — Fuse box location & guideToyota Highlander — Oil capacity & typeToyota Highlander — Tire pressureToyota Highlander — Towing capacityToyota Highlander — Bolt pattern & wheel sizes Recommended tools Automotive MultimeterCompression TesterBattery & Charging System Tester Read your code: OBD-II scanners →