Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
Diagnostic Methods 2-21
Freeze Frame Data
Freeze Frame Data
OBDII Freeze Frame Data
Freeze frame data allows access to emission related values from specific generic parameter identification (PID). These values are stored when an emission related diagnostic trouble code (DTC) is stored in continuous memory. This provides a snapshot of the conditions that were present when the DTC was stored. Once one set of freeze frame data is stored, this data remains in memory even if another emission related DTC is stored, with the exception of misfire or fuel system DTCs. Once freeze frame data for a misfire or fuel system DTC is stored it overwrites any previous data, and freeze frame data is no longer overwritten. When a DTC associated with the freeze frame data is erased or the DTCs are cleared, new freeze frame data can be stored again. In the event of multiple emission related DTCs in memory, always note the DTC for the freeze frame data.
FREEZE FRAME DATA TABLE
Acronym | Description | Measurement Units |
|---|---|---|
APP_D | Accelerator Pedal Position D | % |
APP_E | Accelerator Pedal Position E | % |
BARO | Barometric Pressure | kPa |
CATTEMP11 | Catalyst Temperature Bank 1, Sensor 1 | Degrees |
CATTEMP21 | Catalyst Temperature Bank 2, Sensor 1 | Degrees |
CLRDIST | Distance Since Codes Cleared | Km/mi |
ECT | Engine Coolant Temperature | Degrees |
EQ_RAT | Commanded Equivalence Ratio | Unit |
EQ_RAT11 | Lambda Value Bank 1, Sensor 1 | Unit |
EQ_RAT21 | Lambda Value Bank 2, Sensor 1 | Unit |
EVAPPCT | Commanded Evaporative Purge | % |
FLI | Fuel Level Input | % |
FRP | Fuel Rail Pressure | kPa |
FUELSYS1 | Open/Closed Loop 1 | OL/CL/OL DRIVE/OL FAULT/CL FAULT |
FUELSYS2 | Open/Closed Loop 2 | OL/CL/OL DRIVE/OL FAULT/CL FAULT |
IAT | Intake Air Temperature | Degrees |
LFT1 | Long Term Fuel Bank 1 | % |
LFT2 | Long Term Fuel Bank 2 | % |
LOAD | Calculated Load Value | % |
MAF | Mass Airflow Rate | g/s |
MAP | Manifold Absolute Pressure | Volts/kPa/ PSI/in-Hg |
O2S11 | Bank 1 Upstream Oxygen Sensor (11) | Volts/mA |
O2S12 | Bank 1 Downstream Oxygen Sensor (12) | Volts |
O2S21 | Bank 2 Upstream Oxygen Sensor (21) | Volts/mA |
O2S22 | Bank 2 Downstream Oxygen Sensor (22) | Volts |
RPM | Engine RPM | RPM |
RUNTM | Run Time | Seconds |
SFT1 | Short Term Fuel Bank 1 | % |
SFT2 | Short Term Fuel Bank 2 | % |
SPARKADV | Spark Advance | Degrees |
2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.