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Home >> Lexus >> 1993 >> SC 400 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostic System >> Diagnostic Trouble Codes >> Code 55

Code 55

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Condition is: no knock sensor signal to ECM for 3 crank revolutions with engine speed 1600-5200 RPM. Probable cause: open or short in No. 2 knock sensor circuit, loose No. 2 knock sensor or defective ECM.