DTC Priorities for Troubleshooting

If troubleshooting priorities for multiple DTCs are given in the applicable diagnostic chart, these should be followed.
If no instructions are given, troubleshoot DTCs according to the following priorities.
(1) DTCs other than fuel trim malfunction (DTC P0171, P0172), EGR (DTC P0401, P0402), and misfire (DTC P0300 - P0306).
(2) Fuel trim malfunction (DTC P0171, P0172) and EGR (DTC P0401, P0402).
(3) Misfire (DTC P0300 - P0306).