I have a 96 Blazer, and my check engine light is on and when I tested the code I got a P0140. I changed the sensor and it is still telling me that there is no activity and it still has the P0140 code. I also checked the wires to the sensor and it has voltage to it. I really don't know what else to do. Can any one give me advice on what to do next? I am at my wits end. Thanks in advance.