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