Freeze Frame Data Table
| Acronym | Description | Measurement Units |
|---|---|---|
| AAT | Ambient Air Temperature | Degrees F |
| APP_D | Accelerator Pedal Position D | Percent |
| APP_E | Accelerator Pedal Position E | Percent |
| BARO | Barometric Pressure | Frequency/Pressure |
| CATTEMP11 | Catalyst Temperature Bank 1, Sensor 1 | Degrees F |
| CLRDIST | Distance Since Codes Cleared | Mileage |
| ECT | Engine Coolant Temperature | Degrees F |
| EQ_RAT11 | Equivalence Ratio Lambda, Bank 1, Sensor 1 | Ratio |
| EVAPPCT | Commanded Evaporative Purge | Percent |
| EVAP_VP | Evaporative System Vapor Pressure | Pressure |
| FLI | Fuel Level Input | Percent |
| FUELSYS1 | Open/Closed Loop | Open Loop/Closed Loop |
| IAT | Intake Air Temperature | Degrees F |
| LFT1 | Long Term Fuel Bank1 | Percent |
| LOAD | Calculated Load Value | Percent |
| MAF | Mass Airflow Rate | Volts/Mass Flow |
| MAP | Manifold Absolute Pressure | Volts/Pressure |
| O2S11 | Bank 1 Upstream Oxygen Sensor (11) | Volts |
| O2S12 | Bank 1 Upstream Oxygen Sensor (12) | Volts |
| RPM | Engine RPM | RPM |
| RUNTM | Run Time | Time |
| SFT1 | Short Term Fuel Bank1 | Percent |
| SPARKADV | Spark Advance | Degrees |
| TAC_PCT | Commanded Throttle Actuator | Percent |
| TP | Absolute Throttle Position | Percent |
| TP_REL | Relative Throttle Position | Percent |
| VSS | Vehicle Speed | Speed |
| WARMUPS | Number of Warmups Since Code Cleared | Number |
Some unique PIDs are stored in the keep alive memory (KAM) of the powertrain control module (PCM) to help in diagnosing the root cause of misfires. These PIDs are collectively called misfire freeze frame (MFF) data. These parameters are separate from the generic freeze-frame data that is stored for every malfunction indicator lamp (MIL) code. They are used for misfire diagnosis only. The MFF data is more useful for misfire diagnosis than the normal diagnosis only. It is captured at the time of the highest misfire rate and not when the DTC is stored at the end of a 1, 000 or 200 revolution block. (Generic freeze-frame data for misfire can be stored minutes after the misfire actually occurred.)
The MFF PIDs are supported on all vehicles, but may not be available on all scan tools because enhanced PID access may vary by scan tool manufacturer.