IMPORTANT: A scan tool that displays faulty data should not be used, and the problem should be reported to the scan tool manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Engine Scan Tool Data List (Part 1 Of 5):
Engine Scan Tool Data List (Part 2 Of 5):
Engine Scan Tool Data List (Part 3 Of 5):
Engine Scan Tool Data List (Part 4 Of 5):
Engine Scan Tool Data List (Part 5 Of 5):
Only the parameters listed are use in diagnosis. For further information on using the scan tool to diagnose the PCM and related sensors, refer to the applicable system. If all values are within the typical range, refer to Symptoms for diagnosis. The Typical Scan Data Values table contains all the parameters included in the data lists arranged in alphabetical order:
Engine Idling, Fully Warmed-Up, Closed Loop, Transmission in Park or Neutral.
Engine Data
^ ENG 1 - Contains general information regarding fuel delivery and basic engine operating conditions.
^ ENG 2 - Contains general information regarding IC, KS, A/C, and basic engine operating conditions.
Specific Engine Data
^ EGR - Contains information specific to the Exhaust Gas Recirculation system flow diagnostics and the EGR valve pintle position sensor diagnostics. Also displays parameters required to verify proper EGR system operation.
^ [1][2]EVAP - Contains information specific to the EVAP system diagnostics. Also displays parameters required to verify proper EVAP system operation.
^ CATALYST - Contains information specific to the TWC diagnostics and parameters required to verify proper TWC system operation.
^ HO2S - Contains information specific to the Heated Oxygen Sensor diagnostics and parameters required to verify proper HO2S operation.
^ MISFIRE - Contains information specific to the misfire diagnostics and parameters required to verify proper operation with regard to misfire.