P1685 Code

Fix the car engine properly and if you are the right person who can solve the car engine, you should not try to fix the car engine. The car engine P1685 Code is found from the test of the car engine. The catalytic converter has an oxygen sensor what is setup in front and behind catalytic converter. When the car engine is warm and running in closed loop mode for long time, the upstream oxygen sensor waveform reading should alter. Do not drive the car with the car engine problem and solve the car engine properly. Do not use any wrong meaning of the code for solving the car engine.