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Buick
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2003
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Regal GS
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System Self-Diagnostics - 3.8L
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Diagnostic Tests
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DTC P1381: Misfire Detected - No Communication With Brake Control Module
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Conditions For Running DTC
Conditions For Running DTC
Engine load is less than 87 percent.
Engine speed is less than 5000 RPM.
Vehicle speed is more than 10 MPH.
Engine misfire detected - DTC P0300 set.