PIDS provide valuable diagnostic information when checking the operation or status of various sensors, circuits and switches in the vehicle's engine management system.įor example, if the MIL lamp is on and you find an oxygen sensor code, you can call up the oxygen sensor PIDS on your scan tool display to see what the oxygen sensor is telling the PCM. Long and Short Term Fuel Trim, O2 sensor cross counts, injector duration.(Oxygen sensor rich/lean indication, coolant temperature, MAP value, TPS value, vehicle speed, mass air flow, ambient temperature, engine rpm, etc.) (Ready or Complete, or Not Ready or Incomplete) Status of the OBD II System Component Monitors.PIDS are the serial data that can be accessed from the vehicle computer using a scan tool.
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