Freeze Frame Data Storage and Erasure

All OBD II monitored systems provide "freeze-frame" data on the vehicle's operating conditions when a maturing code was set. This information can be retrieved using the DRB III diagnostic scan tool, and may help a technician pinpoint the source of a concern more quickly. When there are multiple monitor failures, the first to occur is stored in the freeze frame. The exceptions are the misfire and fuel system monitors, They have priority and can write over other freeze-frame data. Information in the freeze frame includes:

^ Diagnostic Trouble Code (DTC)
^ Engine RPM
^ Engine load
^ Fuel trim (short term and long term)
^ Engine Coolant Temperature (ECT)
^ Manifold Absolute Pressure (MAP)
^ Operation mode (open or closed loop)
^ Vehicle speed