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Diagnostic procedure

Check that the battery voltage is 12 V or more and fuel remains approx. half [20 - 40 L (5.3 - 10.6 US gal, 4.4 - 8.8 Imp gal)].
Using the Subaru Select Monitor, clear the memory of [Engine Control System].
Drive according to the drive pattern described below.

Fig 1: Drive Pattern
Courtesy of SUBARU OF AMERICA, INC.
Read the temporary code using the Subaru Select Monitor or general scan tool.