DTC Priorities for Troubleshooting

Priorities for troubleshooting

If troubleshooting priorities for multiple DTCs are given in the applicable DTC chart, these should be followed.

If no instructions are given, troubleshoot DTCs according to the following priorities.
1. DTCs other than fuel trim malfunction (DTCs P0171 and P0172) and misfire (DTCs P0300 - P0306).
2. Fuel trim malfunction (DTCs P0171 and P0172).
3. Misfire ( DTCs P0300 - P0306)