Exactly as it says. I just reconfigured the wiring in my truck to do away with the whipple electronics. All connections are secure (I double checked.) I keep getting this message when doing a O2 sensor test and I also get bad results on the system readiness test. :roll: It looks like the evacuative purge, the O2 heater and the O2 come up bad. However, when monitoring it looks like the O2's are showing completely normal voltage fluctuations. Any ideas?