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problems such as performance characteristics offset, sensitivity reduction,
can be judged in live data.
In the process of diagnosis, if the device shows “System is OK” or “No
Trouble Code”, it means there is no related trouble code stored in ECU
or some troubles are not under the control of ECU, most of these troubles
are mechanical system troubles or executive circuit troubles, it is also
possible that signal of the sensor may bias within limits, which can be
judged in Live Data.
Figure 4-11 Sample of PIDs List
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