california: I went to purchase a o2 sensor for my car and the didn't have the o2 sensor for a car without California emissions. Is there a difference between an 02 sensor for California emissions and an o2 sensor that is not for California emissions? The told me the difference was the length in wires. The sensor is for a 2005 Pontiac Grand Prix GTP with a Supercharger.|||Most car companys build their cars according to calif emmissions...We have the strictest laws....So when they do this they have all 50 states covered with one system...I think this o2 sensor thing is B.S.|||There might be. In recent years a new type of O2 sensor has appeared. The ones we are used to are now known as narrowband sensors - they are biased to 0.45 volts by the computer and drop to about 0.1 volt when the mixture is lean and rise to about 0.9 when the mixture is rich. The computer chases the mixture back and forth across the crossover point several times a second (7 is good, 4 is not) to keep the average mixture right. The new sensors, called wideband sensors, produce a more linear output. It is possible the California version uses the wideband sensor. The two are not interchangeable.|||Its not the wire length, it is what the o2 is calibrated for that type of engine and how the fuel system is managed by the PCM software, the people at the parts store is asking you if your o2 is a long or short wire, meaning up stream or down stream. Rotten you have no clue on how a EFI system works, the o2 is used yes for emissions but is also used to help fine tune the fuel management. defiantly not BS|||Internally, no difference. If they're different, ask them to show you both!|||about 50 bucks