LEMON Manuals
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WRX STI
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Engine Control System (Diagnostics) (2 Of 4) (STI)
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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
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DTC P0301: Cylinder 1 Misfire Detected
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Diagnostic Method
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180° Interval Difference Method
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180° Interval Difference Method
Diagnostic value
180 degree interval difference = (B - A) - (F - B)/4
Judge as a misfire in the following cases.
180 degree interval difference>Judgment value of positive side
180 degree interval difference = Judgment value of negative side
(Diagnostic value before 180° CA)
Courtesy of SUBARU OF AMERICA, INC.