Freeze Frame Data Mode: Description

FREEZE FRAME DATA MODE allows access to emission-related values from specific generic Parameter Identifications (PIDs). These PID values are stored when an emission-related DTC is stored in continuous memory and provide a snapshot of the conditions that were present when DTC was stored. See FREEZE FRAME DATA table.

Freeze frame data will remain in memory even if another emission-related DTC is stored, with exception to misfire or fuel system DTCs. When freeze frame data for a misfire or fuel system DTC is stored, it will overwrite any previous data and freeze frame data will not be overwritten. When freeze frame DTCs are erased or a PCM memory reset is performed, new freeze frame data will be stored. If multiple emission-related DTCs are stored in memory, always note freeze frame data DTC.

FREEZE FRAME DATA

Acronym

Description

Measurement Units

ECT

Engine Coolant

°F

FUELSYS1

Open/Closed Loop1

⁽¹⁾ OL; CL; OL Drive; OL Fault; CL Fault

FUELSYS2

Open/Closed Loop2

⁽¹⁾ OL/CL/OL Drive, OL Fault, CL Fault

LONGFT1

Long Term Fuel Bank No. 1

Percent

LONGFT2

Long Term Fuel Bank No. 2

Percent

LOAD

Calculated Load Value

Percent

RPM

Engine RPM

Rev/Min

SHRTFT1

Short Term Fuel Bank No. 1

Percent

SHRTFT2

Short Term Fuel Bank No. 2

Percent

VSS

Vehicle Speed

MPH/KMH

⁽¹⁾	OL = Open Loop, Closed Loop (CL) conditions have not been satisfied. CL = Using HO2S feedback for fuel control. OL Drive = Open loop due to driving conditions (heavy acceleration). OL Fault = Open loop due to vehicle system fault. CL Fault = Closed loop fuel control, but fault with HO2S sensor(s).