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 List
The Engine Scan Tool Data List contains all engine related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.
- The Diagnostic System Check - Vehicle is completed.
- No DTCs
- On-board diagnostics are functioning properly.
Use the Engine Scan Tool Data List only after the following is determined:
Scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normal running engine.
Only the parameters listed below are referred to in this information for use in diagnosis. If all values are within the typical range described below, refer to Symptoms - Engine Controls for diagnosis.
The column labeled Data List indicates where a parameter can be located on the scan tool. Refer to the scan tool operating manual for the exact locations of the data lists. The following is a description of each term listed:
- All
-
The Parameter is in all of the data lists indicated below.
- ED
-
Engine Data 1 List
- EVAP
-
EVAP Data
- FT
-
Fuel Trim Data List
- MF
-
Misfire Data List
- TAC
-
Throttle Actuated Control Data List
- HO2S
-
HO2S Data
- ID
-
Ignition Data
| Scan Tool Parameter | Data List | Parameter Range/Units | Typical Data Values |
|---|---|---|---|
| Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off | |||
| A/C Relay Command | ED, MF | On/Off | Off |
| A/C Request | MF | Yes/No | No |
| Air Fuel Ratio | ED, FJ, HO2S | Ratio | 14.7:1 |
| APP Indicated Angle | ED, EVAP, FJ, HO2S, ID, MF, TAC | 0-96% | 0% |
| APP Sensor 1 | TAC | %/Volts | 0%/1.02 Volts |
| APP Sensor 2 | TAC | %/Volts | 0%/4.04 Volts |
| APP Sensor 1 and 2 | TAC | Agree/Disagree | Agree |
| APP Sensor 1 Circuit | TAC | -- | -- |
| APP Sensor 2 Circuit | TAC | -- | -- |
| BARO | ED, EVAP, FT, HO2S, ID | kPa | 65-104 kPa/ Varies w/Altitude |
| Catalytic Converter Protection Active | FT, HO2S | -- | -- |
| CKP Active Counter | ID | 1-250 | 9-250 |
| CMP Active Counter | ID | Counts | Varies |
| CMP Sensor | ED, ID, MF | RPM | RPM |
| Cold Start-Up | ED, EVAP | Varies | Varies |
| Crank Request Signal | Eng 3 | Yes/No | No |
| Cruise Control Active | TAC | Yes/No | No |
| Cycles of Misfire Data | MF | 0-100 Counts | Varies |
| Decel Fuel Cutoff | ED, FT, HO2S | -- | -- |
| Desired Idle Speed | ED, EVAP, TAC | RPM | PCM Controlled |
| EC Ignition Relay Feedback | ED | Volts | Volts |
| EC Ignition Relay Feedback | TAC | Volts | Volts |
| ECT Sensor | ED, EVAP, FT, HO2S, ID, MF, TAC | -40 to -40°C (+151 to +303°F) | 88-105°C (190-221°F) Depends on ambient temperature |
| Engine OFF Time | EVAP | -- | -- |
| Engine Load | ED, EVAP, FT, HO2S, ID, MF, TAC | 0-100% | 23-24% @ Idle 7-42% @ 2500 RPM |
| Engine Oil Pressure Switch | ED, MF | OK/Low | OK |
| Engine Run Time | ED, EVAP, HO2S, ID, MF, TAC | Hrs, Min, Sec | Varies |
| Engine Speed | ED, EVAP, FT, HO2S, ID, MF, TAC | 0-10,000 RPM | 500-700 RPM |
| EVAP Fault History | EVAP | -- | -- |
| EVAP Purge Solenoid Command | ED, EVAP, FT | 0-100% | 10-30% |
| EVAP Vent Solenoid Command | ED, EVAP | Not Venting/Venting | Venting |
| Fuel Tank Level Remaining | ED, EVAP, MF | % | % |
| Fuel Tank Pressure Sensor | ED, EVAP | mm/Hg / In H2O | Varies |
| Fuel Tank Pressure Sensor | EVAP | mm/Hg / In H2O/Volts | Varies |
| Fuel Trim Cell | ED, EVAP, FT | 0-23 | 16, 17, 21 |
| Fuel Trim Learn | ED, EVAP, FT | -- | -- |
| Fuel Level Sensor | EVAP | 0-100% | Varies |
| Fuel Pump Relay Command | ED | On/Off | On |
| HO2S 1 | ED, EVAP, FT, HO2S | mV | 10-1,000 mV and Varying |
| HO2S 2 | ED, FT, HO2S | mV | 10-1,000 mV and Varying |
| HO2S 1 Heater Current | HO2S | Amps | Varies |
| HO2S 2 Heater Current | HO2S | Amps | Varies |
| Hot Open Loop | FT, HO2S | -- | -- |
| IAT Sensor | ED, EVAP, FT, ID, MF | -40 to +151°C (-40 to +303°F) | Depends on ambient temperature |
| Ignition 1 Signal | ED, EVAP, FT, HO2S, ID, MF, TAC | 0-25 volts | 11.5-14.5 Volts |
| Initial Brake Apply Signal | TAC | ON/OFF | ON/OFF |
| Initial Brake Supply Signal | ED | -- | -- |
| Injector PWM | FT, MF | Milliseconds | 2-6 ms |
| Knock Retard | ID | ° | ° |
| Long Term FT | ED, EVAP, FT, HO2S | % | Near 0% |
| Long Term FT Avg | FT | % | % |
| Loop Status | ED, EVAP, FT, HO2S | Open/Closed | Closed |
| MAF Sensor | EVAP, FT, HO2S, MF | Hz | Hz |
| MAF Sensor | ED, EVAP, FT, HO2S, ID, MF, TAC | g/s | Varies |
| MAP Sensor | ED, EVAP, FT, HO2S, ID, MF, TAC | kPa | 20-48 kPa |
| Medium Resolution Resync Counter | ID | Counts | 0 |
| MIL Command | ED, EVAP, ID | Off/On | Off |
| MIL Requested By DTC | ED, EVAP, ID | -- | -- |
| Mileage Since DTC Clear | ED | M/Km | M/Km |
| Misfire Current Cyl #1 | MF | Varies | 0 |
| Misfire Current Cyl #2 | MF | Varies | 0 |
| Misfire Current Cyl #3 | MF | Varies | 0 |
| Misfire Current Cyl #4 | MF | Varies | 0 |
| Misfire History Cyl #1 | MF | Varies | 0 |
| Misfire History Cyl #2 | MF | Varies | 0 |
| Misfire History Cyl #3 | MF | Varies | 0 |
| Misfire History Cyl #4 | MF | Varies | 0 |
| PCM Reset | ED, EVAP, ID | -- | -- |
| Power Enrichment | ED, FT, HO2S, MF | Active/Inactive | Inactive |
| Reduced Engine Power | TAC | Active/Inactive | Inactive |
| Reference Voltage 1 Signal | ED, EVAP, ID, TAC | Volts | 5.03 V |
| Reference Voltage 2 Signal | ED, EVAP, ID, TAC | Volts | Volts |
| Short Term FT | ED, EVAP, FT, HO2S | % | Near 0% |
| Short Term FT Avg | FT | % | % |
| Spark | ED, FT, HO2S, ID, MF | Degrees | 11-20° |
| Start Up ECT | EVAP, FT | °C/°F | Varies |
| Start Up IAT | EVAP, FT, HO2S | °C | °C |
| Stop Cam Pedal Switch | TAC | ON/OFF | ON/OFF |
| Total Misfire Count | MF | -- | -- |
| TP Desired Angle | TAC | % | 4.20% |
| TP Sensor Learned Minimum | TAC | Volts | Volts |
| Torque Request Signal | TAC | N.m | Varies |
| Torque Delivered Signal | TAC | N.m | Varies |
| TP Indicated Angle | ED, EVAP, FT, HO2S, ID, MF, TAC | % | 4.20% |
| TP Sensors 1 and 2 | TAC | Agree/Disagree | Agree |
| TP Sensor 1 | TAC | 0-100% | 4% |
| TP Sensor 2 | TAC | 0-100% | 4% |
| TP Sensor 1 | TAC | 0-5.0 volts | 4.24 volts |
| TP Sensor 2 | TAC | 0-5.0 volts | 0.78 volts |
| Traction Control Status | TAC | Active/Inactive | Inactive |
| TWC Temperature Calculated | MF | C/F | 350°C |
| Vehicle Speed Sensor | ED, EVAP, HO2S, ID, MF, TAC | km/h mph |
0 |
| Warm-ups w/o Non-Emissions Faults | ED | -- | -- |
| Warm-ups w/o Emissions Faults | ED | -- | -- |
NO RELATED
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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.