Leak test, fuel pressure, flow capacity and adaptation procedure: Notes

The car can exhibit certain fault symptoms without generating a diagnostic trouble code. This can be due to an air leak in the system or insufficient fuel pressure and flow capacity.

The fault diagnosis listed below includes checking air leaks, fuel pressure, flow capacity and adaptation procedures. If a trouble code is present the appropriate fault diagnosis procedure should be used. The method below is to be used if the problem cannot be traced with a diagnostic trouble code.