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Home >> Subaru >> 2018 >> WRX STI >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 4) (STI) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0506: Idle Control System Rpm - Lower Than Expected >> Execution Condition
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Execution Condition

Secondary parameters Execution condition
Battery voltage ≥ 10.9 V
Barometric pressure ≥ 75.1kPa (563mmHg, 22.2inHg)
Lambda value (left and right) ≥ 0.85
and
< 1.151
Vehicle speed ≥ 0 km/h (0 MPH)
Engine coolant temperature ≥ 60°C (140°F)
Elapsed time after starting the engine ≥ 10s
Accelerator pedal position ≥ 0%
Elapsed time after gear position change
(P ↔ D or N ↔ D)
> 5s
Cold start diagnosis Not in operation
Main feedback In operation
Idle speed control feedback In operation