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Home >> Subaru >> 2015 >> WRX Limited, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC) (STI)) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P219A Bank 1 Air-Fuel Ratio Imbalance >> Enable Conditions

Enable Conditions

WARNING: This page is about a different variant/trim than selected.

Monitor A1: Primary oxygen sensor fluctuation 

Monitor A1: Primary oxygen sensor fluctuation

ENGINE SPEED SPECIFICATION

Secondary Parameters Enable Conditions
Battery voltage ≥ 10.9 V
Atmospheric pressure ≥ 75.1 kPa (563 mmHg, 22.2 inHg)
Closed loop control with primary oxygen sensor Active
Engine speed > 1600 rpm
and
< 3200 rpm
Intake air mass ≥ 0.80 g/rev (0.03 oz/rev)

Monitor B1: Crankshaft speed fluctuation 

Monitor B1: Crankshaft speed fluctuation

VEHICLE SPEED SPECIFICATION

Secondary Parameters Enable Conditions
Misfire diagnosis monitor Active
Accelerator pedal position = 0%
Vehicle speed ≤ 2 km/h (1.2 MPH)
Engine speed > 550 rpm
and
< 1065 rpm
Intake air mass per revolution > 0 g/rev (0 oz/rev)
and
< 10 g/rev (0.35 oz/rev)