It is probably a faulty O2 sensor. But check O2 sensor wiring and connections for damage first.
Trouble code P1516 means: TAC Module Throttle Actuator Position Performance
Trouble Code P1640 means:Control module output A circuit
For 1996 and newer Trouble code P0420 means:Catalyst system efficiency below threshold (bank 1)
Trouble code P0171 means: Fuel System Lean (Bank 1)
Trouble code P0234 means:Engine overboost condition
Trouble code P0177 means:Fuel composition sensor circuit range/performance
Trouble code P1694 means: No CCD message from PCM- Aisin transmission
Trouble code P1693 means: A companion DTC was set in both the ECM and PCM
Trouble code P0483 means: Fan Performance
Trouble code P0340 means:Camshaft position sensor circuit malfunction
Trouble code P0401 means: Insufficient EGR Flow Detected Replace the EGR Valve
Yo can not "change" an engine code. You need to repair what is causing the code.Yo can not "change" an engine code. You need to repair what is causing the code.