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Wideband Sensor
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<blockquote data-quote="mwolson" data-source="post: 13058014" data-attributes="member: 16006"><p>Ground offset compensation is possible, but why go through the hassle?</p><p></p><p>You know what? I set it up wrong in my car when I grounded it to G201 due to that being the signal ground for the PCM.</p><p></p><p>If you are using a datalogger such as the SCT Xcal2 I use (or the X3), the analog output from the WB is wired to the analog input to the datalogger. The SCT handheld gets grounded by the grounds of the OBD2 port, not those of the PCM. The signal ground of the OBD2 port is actually G104, so that is the one you should be using.</p><p></p><p>Since G104 is up by the battery, we are essentially back to what crazycarlo said, but for a different reason.</p><p></p><p>I guess crazycarlo isn't so crazy. And I am sorry for misleading you guys.</p><p></p><p>The good news is, I had no noticeable ground offset for my wideband when I grounded it at G201.</p></blockquote><p></p>
[QUOTE="mwolson, post: 13058014, member: 16006"] Ground offset compensation is possible, but why go through the hassle? You know what? I set it up wrong in my car when I grounded it to G201 due to that being the signal ground for the PCM. If you are using a datalogger such as the SCT Xcal2 I use (or the X3), the analog output from the WB is wired to the analog input to the datalogger. The SCT handheld gets grounded by the grounds of the OBD2 port, not those of the PCM. The signal ground of the OBD2 port is actually G104, so that is the one you should be using. Since G104 is up by the battery, we are essentially back to what crazycarlo said, but for a different reason. I guess crazycarlo isn't so crazy. And I am sorry for misleading you guys. The good news is, I had no noticeable ground offset for my wideband when I grounded it at G201. [/QUOTE]
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