My vehicle: PT Cuiser 2.4 GT, BJ: 2008, mileage: 102 TKm Dear fellow fighters, after effort of search and no reasonable hit, here is the description of my problem. After lighting up the MKL I leave out P0139. I then replace the sensor 2 (after Kat) with a Lambdasonde by BOSCH (LS 50207, F 00H L00 207 – 760). After clamping the battery, which I had clamped down for the replacement, the error was gone first. he. The immediate reading of the error brought the error code P0138. I understand that the code “Bank 1 Sensor 2 – high voltage, i.a. above threshold for 20 sec” means. However, I lack experience as to how I should continue. I would be very grateful if someone with error limitation would help me. Gruss, Alex