P0036 and P0140 Fault Codes on 2015 Jetta 1.8TSI - How to Diagnose and Fix

Model: 2015 Jetta 1.8TSI Fault Code: P0036 Posted: 2020-06-20 15:46

My 2015 Jetta Comfortline is showing fault codes P0036 and P0140. The vehicle has an undercarriage cover that obscures the downstream O2 sensor connection plug, making visual inspection difficult. I'm looking for guidance on how to properly diagnose these issues, especially given the physical obstruction of the sensor wiring.