Originally Posted by
Jimboxr4x4
The Secs monitor reads the sensors. You're taking the the reading off rhe the wires at the point they join the ecu so you're seeing exactly what the ecu is seeing from the sensors.
not necessarily. they may be a wiring or component fault in between that you wouldn't see, or something wrong with the calibration that scales something like a MAP sensor incorrectly. you will only know these things if you tap into the ECU datastream.