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Home >> Subaru >> 2022 >> WRX Base, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) - Introduction >> Inspection Mode >> Procedure >> Inspection Mode Ab
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Inspection Mode Ab

DTC Description & trouble part Condition Number of driving cycles on the detecting condition
P0234 TURBOCHARGER/SUPERCHARGER "A" OVERBOOST CONDITION - 2
P0299 TURBOCHARGER/SUPERCHARGER "A" UNDERBOOST CONDITION - 2
P226B TURBOCHARGER/SUPERCHARGER BOOST PRESSURE TOO HIGH - MECHANICAL - 1
WARNING:

When performing inspection mode AB on a public road, pay sufficient attention to the traffic condition and give the highest priority to safe driving. 

NOTE:

Perform the inspection mode after warming up the engine except that the engine coolant temperature at engine start is specified. 

  1. 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)].
  2. Using the Subaru Select Monitor, perform the clear memory of [Engine]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY
  3. Drive according to the drive pattern described below.
    G14614385Courtesy of SUBARU OF AMERICA, INC.
  4. Read the pending code using the Subaru Select Monitor or general scan tool. Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)