Diagnostic Aids

A restricted fuel filter can supply adequate fuel at idle but not enough during heavy acceleration. A vapor lock condition can also set DTC. If DTC cannot be reset, original cause of DTC could have been caused by engine running out of fuel.

Use of FREEZE FRAME and/or FAILURE RECORDS mode will aid in locating intermittent condition. If DTC cannot be duplicated, information in data can be useful in determining how many miles since the DTC set. This mode can also be used to determine how many ignition cycles the diagnostic reported a pass and/or fail condition. Operating the vehicle within the FREEZE FRAME conditions (RPM, load, vehicle speed, temperature, etc.) will isolate when DTC failed.