OBD II Freeze Frame Data

When the first emissions related powertrain DTC becomes stored, the PCM will capture (save) a block of current engine parameters. This list of parameters is called Freeze Frame Data and consists of a fixed list of parameters. For vehicles which do not support all the parameters, only the applicable ones are stored. The first parameter in the list is always the DTC that caused the Freeze Frame. When DTCs are cleared, the Freeze Frame Data is cleared from the vehicle’s PCM. However, the freeze frame data is saved by the scan tool software until you reconnect to another vehicle or exit the program.

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