Priorities For Troubleshooting
WARNING: This page is about a different car, the 2003 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
If troubleshooting priorities for multiple DTCs are given in applicable DTC test, these priorities should be followed. If no instructions are given, perform troubleshooting for those DTCs according to the following priorities:
- DTCs other than fuel trim malfunction (DTCs P0171, P0172, P0174 and P0175) and misfire (DTCs P0300-P0308).
- Fuel trim malfunction (DTCs P0171, P0172, P0174 and P0175).
- Misfire (DTCs P0300-P0308).