I have been running T-Max for quite a while on my last two bikes. Recently I started getting P0131 and P0151 codes (O3 sensors low) so I decided to reload the last good map I had saved. In the process I also checked for a newer firmware package. All the while I was doing this I was reading 19.36 on both O2 sensors. This indicates the sensors are OK. After I downloaded the last known good map I started to initialize the module and got the error message telling me that the module could not "see" the sensors. I have checked all connections, fuses and cleaned the sensors. Have 12+ volsts at the data port. Still no seeing the sensors. I deleted the software and reloaded the T-Max software. Then I reloaded the firmware and downloaded my good map again. Still no seeing the sensors. Three e-mails to Zippers unanswered. Any ideas or suggestions??? I have found new sensors locally for $52 each but have a hard time thinking that both sensors suddenly went out. Have loved the T-Max til now.