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Home >> Subaru >> 2021 >> WRX Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (2.0L) (2 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0301: Cylinder 1 Misfire Detected >> Execution Condition
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Execution Condition

Secondary parameters Execution condition
Battery voltage > 8 V
Fuel shut-off function Not in operation
Engine speed 400 - 6500 rpm (CVT model)
550 - 6800 rpm (MT model)
Intake manifold pressure
  • Normal ignition
19 - 48.3 kPa
(Changes based on the engine speed and atmospheric pressure.) (142.5 - 362.3 mmHg, 5.6 - 14.3 inHg) (CVT model)
13.8 - 43.7 kPa (103.5 - 327.8 mmHg, 4.1 - 12.9 inHg) (MT model)
  • Idle ignition
19 - 48.7 kPa
(Changes based on the engine speed and atmospheric pressure.) (142.5 - 365.3 mmHg, 5.6 14.4 inHg) (CVT model)
13.8 - 50.3 kPa (103.5 - 377.3 mmHg, 41 - 14.9 inHg) (MT model)
Time elapsed after engine start > 2 crankshaft revolutions
Following condition A or B is met  
A: Engine coolant temperature at engine starting > -7°C (19.4°F)
B: Following conditions (b1) and (b2) are met  
(b1) Engine coolant temperature at engine starting <-7°C (19.4°F)
(b2) Engine coolant temperature > 21°C (69.8°F)