I replace sensors 3 time already with oem parts, works fine for about two weeks then ck engine come back on, what could be my problem for the sensors to keep going bad .
thanks for any replys

You need a scan tool to properly diagnose the problem by following a troubleshooting tree. As you can see, throwing new and expensive sensors at it is not fixing the problem. P0132= Check the wiring (green/red wire) between the o2 sensor and PCM for a short to voltage. P0138= Check wiring (black/dark green) between o2 sensor and PCM for shorts to voltage.