Using OBD Wizard with an ELM scan tool, my Short Term Fuel Trim (Bank 1, Sensor 2) stays at -1 all the time. In fact the value, min, mean, and max values are all -1 as you can see in the attached image. Could this mean the ECM or computer has a problem? Could this be the reason Cyl No 6 has a constant misfire? You can also see there are values for the Short Term Fuel % trim - Bank 1 which are a little negative or lean condition. Could Bank 1 Sensor 2 O2 sensor be bad? Thanks for your help.
My problem is I get p0306 and sometimes p0174. The #6 cylinder won't fire. It has good spark, compression and the injector checks ok with opening and holding, ohms, and noid. I was reading a troubleshooting guide on this engine and tried to hook up my laptop and ELM scan tool. I tested spraying some carb cleaner to test the O2 sensors and they seemed to respond. From this picture can you tell me why the STFT No 2 is -1 across the board? Thanks.
Monday, June 30th, 2014 AT 11:10 PM