Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Scan Tool Data
Typical scan data values table contains all parameters included in the following data lists arranged in alphabetical order. For specific items covered under specific data parameters, see PID VALUE CHARTS - CARS article
- Engine Data 1 (ENG 1)
Contains general information regarding fuel delivery and basic engine operating conditions. - Engine Data 2 (ENG 2)
Contains general information regarding Air Conditioning (A/C), Crankshaft Position (CKP), Camshaft Position (CMP), Knock Sensor (KS), and basic engine operating conditions. - Evaporative Emission (EVAP) Data (EE)
Contains information specific to Evaporative (EVAP) emissions control system. Also displays parameters required to verify proper EVAP system operation. - Freeze Frame/Failure Records (FF/FR)
Contains specific information regarding operating conditions when failure occurred. - Fuel Trim Data (FT)
Contains specific information regarding fuel trim. - Misfire Data (MF)
Contains specific information regarding misfire diagnostics and parameters required to verify proper operation with regard to misfire.
Use typical scan data values only after the following conditions are met:
- Diagnostic system check has been completed.
- Engine is idling unless checking a value at a specified RPM.
- Throttle is closed unless checking a value at a specified RPM.
- Vehicle is in Park or Neutral.
- Vehicle is operating in closed loop.
- Vehicle accessories are turned off.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.